GI Joe SwampMasher
The following model is scaled for the original 1/18 figures at 100%.
I 3D scanned in the original toy parts after careful disassembly and uploaded them into Tinkercad.
Then I used the scan as well as reference images to help reconstruct the model entirely within Tinkercad.
In order to print for GI Joe Classified series (normal Duke sized body), please print all parts at 160%.
If you're going for a larger body like Gung Ho, you might want to print at like 162-163% instead.
I printed the weight bearing structures (i.e. SMFrame and WhelBase) in PETG with 10% gyroid infill.
I think the model is fairly sturdy, but realize that PLA may be structurally weaker and more prone to breaking.
Assembly is fairly straightforward, and is essentially the same as what is available on the original instruction sheet:
https://www.3djoes.com/swampmasher.html
(scroll towards the bottom to see the assembly sheet)
A few of the parts need to be glued together with your favorite adhesive (mine is Gloop!)
Glue GunBodyL and GunBodyR together but make sure you sandwich the SMGatlng part into place first!
SMTurret needs to be printed twice and then glued together.
The "surface to surface" missiles come in two parts and need to be glued together. Print these twice each so you end up with two missiles total.
The rear Roll/Handle bar will need to be glued into the SMBody.
Likewise, the SMXhaust will need to be glued into the rear right side of the SMBody.
When upscaled to 160%, the gatling gun barrels are compatible with Marvel Legends Iron Man repulsor blast effects.
When upscaled to 160%, the rockets are also blast compatible with the Classified Scrap Iron anti-armor missile blast off effects.
Custom Muskrat figure recipe:
Grunt lower half, Quick Kick upper half.
Steel Corps vest.
Dusty head (with camo removed and hair painted orangish.
3D printed boonie hat.
I'm not a professional modeler, just a tinkerer who happens to love the old GI Joe vehicles.
I made this model mainly for myself, but don't mind sharing with my fellow Joe enthusiasts because... yes!
I'm not in it for the money (this is truly just a side hobby for me as I thankfully have a decent 9-5), but if you like the model, buy me a cup of coffee, so I can keep making more cool stuff!
Cheers and YO JOE!!!
EDIT: After seeing Fabio Kobinski's awesome Treaded version of the Swampmasher, I contacted the original designer of the Flexi Track Fidget Toy, Sofun_Art and got approval to upload the files for the treads and tracked wheels. The wheels are a direct swap in. The treads HAVE to be printed in PETG in order to get them to be able to flex / articulate after printing. I tried PLA and it simply does not work.
To assemble: Flex the treads after printing to make sure that they can articulate as intended. Afterwards, orient the treads back into a triangular shape and place a wheel at each vertex. Orient the wheels so that the wider round opening is facing up. Then take the WhelBase and push the wheelmount pins down into the rounded openings (basically, you're mounting all three wheels and the track at the same time).
Don't forget to print all the files at 160% for classified scale! Enjoy!!!