Thanks for the belief mate
Finally getting into the details to finish this epic.
Have spent time over the last 2 days altering spring position in the front and rear roadwheels.
Its about balance. The gearbox set in the front, and the barrel assembly, then the over hang at the rear which with my smoker, really leverages over the back end.
Ended up using heavy duty springs I had from ages ago & never used- and they were clocked 90 degrees.
The front ones were Taigen springs- clocked 180 degrees.
Has taken quite a few attempts to get right, but I reckon Ive sorted it.
The tracks needed full lengths plus 6 links added, but I took out 2 links to run them a bit tight. The 6 link extension worked, but used up much of the tensioner travel, and opened the gap from Idler to roadwheel a bit much.
Aesthetically, I like the long sloppy tracks, but for now I will run them slightly tight until they get a bit of run time & see if they settle in.
If not, I can add links & use the tensioner to get them right & look past the enlarged gap.
For now, its hatch handle time
Large paper clips folded with wide nose pliers.