This is a remix of ThatEmuGuy's excellent 3Dfile. I mixed it to make the print more robust,
Please note even though I thickened the exhaust stack, it still broke when I was cleaning the support material off. because of that I altered the files and created a 3mm wide recess in the hull and a separate exhaust stack. I substituted a piece of 3mm brass tubing to save my test print; that's what you see in the pic, but your file will have a better result.
Please note the tracks have the supports at the bottom; the exposed idler wheel are at the top. I created recesses to aid in assembly but these are purposely loose. I recommend the use ot epoxy for assembling these. As noted in the photo, I elevated the blade when assembling with some thin wood bits; I used CA glue to affix this; it will nestle into the support arms well.
http://www.militarymodelling.com/news/article/armoured-dozer-d8/19166
I am not aware of this unit being represented in any Bolt Action theatre books but it deserves to be; you can still use it as a terrain piece on a beach landing in Western Europe or the Pacific, or use house rules, allowing it to clear obstacles, wire etc.