Yeah, the forum is great. Always someone with a good idea if you get stuck. Cooper, your tires look awesome! You have come far in this hobby in just some 3 years. I sure will review your tire build if I have to mold my tires myself. I´m also considering pneumatic tires. A pal of mine did it for his 1:12 models and it improves running a lot and looks excellent. It involves a lot of extra work but especially for a grader it might well be worth it. The pal has 150+ videos on youtube and I spent only a couple of minutes finding an example of them tires squatting, so there´s probably some even better example:
https://www.youtube.com/watch?v=5yXIwv6qu5Q
On his dumper you see it all the time if you look carefully, but particularly at, for example, 1:00 and 3:40:
https://www.youtube.com/watch?v=rb2oWCIRtsg
Stefan