Swappable Weapons And Shields Using Hidden Magnets

Building Gundam kits with interchangeable gear has become one of the most popular techniques among Australian hobbyists, and magnets are the secret behind clean swaps that do not rely on fragile polycaps. From handheld beam rifles to bulky shields that double as back-mounted armour, a small dab of cyanoacrylate and the right neodymium disc can transform a static display into a flexible configuration you can re-stage for photos, conventions or pure fun.

Local builder communities meet at swap meets in Sydney, Melbourne and Brisbane, where rare magnet sizes sometimes surface in pre-loved toolboxes. With the cost of imported kits climbing and the Australian dollar pinching hobby budgets, getting the magnetic hardware right the first time protects both your wallet and your finished pieces.

Planning Your Magnetisation Build

Going in with a clear plan prevents costly mistakes, especially when a single misplaced pole can ruin an entire batch of parts. Before reaching for your nippers, decide which weapons and shields truly need to swap. Magnetising every joint adds weight and bulk, and not every connection benefits from the treatment. Beam sabers, shield connectors, shoulder pauldrons and forearm-mounted cannons are the usual suspects, while fixed backpack hardpoints usually stay glued.

Sketch the pole arrangement on scrap paper so polarity stays consistent across the whole build. Mark the receiving socket on the body and the matching counter-piece on the weapon, then stick a small coloured dot on north and south. Many local modellers print A4 reference sheets before a long session, which helps when juggling several kits on the kitchen table after the Sunday arvo roast.

Choosing The Right Magnets

Sourcing magnets in Australia usually means either a trip to Jaycar Electronics for small packs or an order through eBay for bulk neodymium discs by post. Most High Grade and Master Grade kits only need 3mm to 6mm discs, and pulling force matters more than raw diameter. Check the supplier's gauss rating so you do not end up with weak ceramics in place of true rare-earth stock.

A 5x2mm disc is the workhorse choice for most modern kits, while anything thicker starts to interfere with seam lines. Picking up a mixed-pack sampler, even at a slightly higher per-unit cost, lets you test a frame before committing to a bulk order that may sit in the local post office longer than expected.

Mounting Magnets Step By Step

Drill a shallow cavity with a pin vise rather than a powered drill, since hardened polystyrene cracks under rotational force. A hand-turned bit lets you feel the moment the bit punches through, and you can ease off before blowing out the inner wall. Test the depth against a spare runner nub so the magnet sits flush or recessed by a fraction of a millimetre.

Apply a single drop of medium-viscosity CA glue with a fine needle and press the magnet home with tweezers. Australian humidity, especially along the east coast in summer, slows full cure time, so leave the part on a clean tile for at least ten minutes before pairing it with its mate. Tape the two halves together while the bond sets so polarity confirms itself the moment the tape is removed. Once the magnets are bedded in, sealing the surrounding plastic with a clear coat keeps finger oils from softening the glue line; the journal's walk-through on a guide to protecting your models with topcoat finishes covers the technique in detail.

Polarity And Common Pitfalls

Every swap point on a single kit should share the same north-south orientation, otherwise your beam rifle will hold firm in the right hand but fly off in the left. A simple trick is to choose one rule for the build: anything that connects to the body is north-up, anything that comes off the body is south-down. Sticking to that rule prevents confusion when you revisit the kit months later.

Magnets also deserve a few safety considerations unique to households with children, pets or sensitive electronics. Small neodymium discs are a genuine choking hazard, so any loose pieces need to live in labelled storage away from toddlers. Keep strong magnets well clear of credit cards, Bluetooth headphones and the hard drives inside your laptop, since the field strength around a 6mm disc can corrupt data in an instant.

Caring For Magnetised Builds

Older kits in your collection may have already yellowed by the time you adopt magnet upgrades, and fresh swaps draw the eye straight to any colour mismatch. A simple retrobright bath and gentle polish can bring a tired runner back to life; the steps are laid out in a companion piece on restoring yellowed plastic. Store finished magnetised kits away from direct sunlight, since UV is the main reason Australian workshop shelves see so much discolouration even on shelf queens.

Wipe magnet mounts with a soft microfibre cloth before each swap, and avoid stacking loaded backpacks on top of each other during transit to a meet-up. A small foam insert cut to the kit's silhouette keeps shields from snapping free when you bump into someone on a crowded display table.

Share your own magnetisation projects in the Display Case gallery, swap tips in the Workshop subforum, and post setup questions for the community in the help threads. Drop photos of your swappable builds during the next Supanova gathering or your local club meet, and let other members know which magnet sizes worked best on your favourite kit.