A Practical Guide To Changing Kit Proportions With Plasticard

Changing a Gundam kit’s proportions can make a familiar design look sharper, heavier, taller, or more mechanically convincing. Plasticard is one of the most useful materials for this work because it is inexpensive, easy to cut, and available in sheets, strips, and rods. With careful planning, it can lengthen limbs, widen armour, deepen torso sections, or add controlled surface volume without rebuilding an entire kit.

The key is to treat proportion work as a series of small geometry changes rather than one dramatic cut. A few millimetres added to the upper arm or waist can alter the whole silhouette, while an uneven spacer can create fit problems that become obvious after primer. Work slowly, record measurements, and test every modification before committing to glue.

Australian builders can usually find styrene sheet through hobby shops in Sydney, Melbourne, Brisbane, and other major cities, while online retailers help when specialist thicknesses are unavailable locally. Allow for postage, GST at checkout, and occasional delays on imported stock. In warm or humid conditions, store plasticard flat and use adhesives in a ventilated space, following the product label and relevant state safety requirements.

Start With The Silhouette

Before cutting, photograph the unmodified kit from the front, side, and rear. Straight-on images reveal whether the shoulders, waist, knees, and feet align visually. Side views are particularly useful for spotting a shallow chest, short forearms, or a backpack that overwhelms the torso. These reference photos become a practical record when parts are separated and the original shape is harder to judge.

Choose one or two proportional goals. You might extend the legs for a taller appearance, widen the shoulders for a stronger upper body, or increase the torso depth for a more armoured look. Avoid changing every section at once. A common approach is to modify the waist, upper arms, and lower legs in separate stages so each alteration can be evaluated before the next one begins.

Select Thickness And Make Spacers

Plasticard thickness determines how visible and structural the modification will be. Thin 0.25 mm sheet is useful for panel overlays and subtle height adjustments, while 0.5 mm to 1 mm sheet works better for spacers, armour extensions, and boxed-out sections. Evergreen-style strips and square rod can create consistent edges without cutting every piece from a large sheet.

For a clean extension, measure the existing part with digital callipers, then cut two matching pieces rather than relying on one oversized insert. Sand the edges square, tape the parts together, and refine them as a pair. When lengthening a jointed section, preserve the original peg and socket relationship wherever possible. A spacer placed away from the joint can change the silhouette while keeping articulation usable.

Modify Joints Without Losing Movement

The most important test is articulation. Dry-fit the plasticard modification with blu-tack or low-tack tape, then move the joint through its full range. Check for armour collision at the hip, knee, elbow, and shoulder. If an extension causes a part to bind, reduce the spacer, bevel the edge, or relocate the added volume to a less crowded area.

Keep weight distribution in mind as well. Large plasticard additions on a backpack or forearm can make a pose unstable, especially on narrow feet. A display base can help, and clear supports are useful when testing flight poses; this clear rod posing guide shows how transparent supports can be integrated without distracting from the model.

Build Strong, Clean Seams

Plastic cement slightly melts styrene, creating a strong bond when two clean surfaces meet. Apply a small amount along the joint and allow it to cure fully before sanding. For gap filling, use additional styrene slivers or putty rather than flooding the seam with glue. This reduces shrinkage and preserves crisp corners.

After the main shape is complete, use sanding sticks in progressively finer grades. Check the surface under a thin coat of primer, because grey primer will expose dips, ridges, and uneven transitions. Scribe panel lines only after the new geometry is stable. If you add vents, cameras, or lenses, plan their placement around the altered panels; painting details such as these benefits from the techniques in this camera and eye painting guide.

Practical Recommendations

Keep a small modification log with the part name, plasticard thickness, and amount added. This is especially helpful when working on symmetrical limbs or when rebuilding a kit after several weeks. Save offcuts in labelled bags, since narrow strips and small rectangles are often perfect for later armour details.

• Photograph every major stage before disassembly.
• Use templates made from paper or masking tape before cutting styrene.
• Alter one body region at a time and test articulation after each change.
• Prime the modified area before final panel lining and painting.
• Share work-in-progress photographs in the Gundam Eclipse forum to compare approaches and get practical feedback.

A well-planned proportion change should look as though it belongs to the original engineering, not like an add-on. Post your measurements, test fits, and finished build in the Display Case or work-in-progress discussions so other builders can learn from the process and help refine future modifications.

Start with a single spacer on a spare or inexpensive kit, document the result, and bring the finished experiment to Gundam Eclipse for constructive feedback from fellow builders.