Very cool Gary! Glad you like them. I'm printing up a set for someone else and I'll post a picture of them on the print plate with all the support material. It's quite a mess to clean up.
On a side note... Martin was designing a halftrack, but had not yet worked out the track part of the design. I designed this track. We invited each other into those projects, and it's looking like my halftrack track design will work on his halftrack design. Two guys, on two different continents, working on scale designs independently, and the parts seem like they will fit together. What a crazy cool thing!
I also designed a track that uses the CCKW doolies to make the CCKW into a halftrack. It isn't historically accurate, (perhaps as a local Alaskan design post WW2??) but I made a working set for fun.
And YES, I spray painted my tracks with Rust-oleum Camo Flat Black.