I'm worse than a girl in a dress shop!! Can't figure out what to build yet. 797 is too big, Brian got the 793 down and I'm now thinking 795b. It's a simpler design to build, more square front end. Tires, problem. 777 are 7.35". 785b are 8.35" and 797 are 12.9" scale. (Just a quick internet look up and I may be wrong. 1:14 scale). I found some hand truck tires 8" that are not correct but I'll just say I got retreads!!! Now the height of bed for loading on the 797 is like 19". The 785b is 14". That would be ok for me to load with the cat I got. I think, a test apparatus I set up. The black line is 14".
And that is with stick level
That is with boom and stick completely extended. So I think at 14" I'll be ok loading on even ground. Want to make as big of one as I can and still be able to load it.