Technically it was done a while ago, but now there's a comm for it! The hull gun on the front is magnetized and can be swapped out for a laser, and the sides are magnetized as well so I can put sponsons on if I ever get around to having some 3d printed. The turret-hull connection is just a giant circular hole so it pops off real easy and I have taken to blu-tacking it in place for transport/games.
The actual name for the model is "Mars Alpha Leman Russ Incinerator", and I run it as an Executioner in 40k.
Behold, the warm glowing warming glow of the turret gun (which I'm still not really happy with even after like 10 revisions):
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The last thing space fascists see before being run over:
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Can confirm, a wet palette is well worth the ~$10 when you're already spending like $3 per color of paint.