David, yes that was an epic and nearly as big as Ben Hurr
fortunately it's winter here and around 18c most days. Most of the springs are more than just suspect but I have replacements.
Lynn/Mike, That is very interesting about the track. Unfortunately I don't have enough original wheels for both. For these tracks to come off, they would certainly have to be extremely loose as they certainly hug the sprocket at the front and the tensioner idler at the rear. Not to mention there is no track displacement. It is great that there is still information around about these tanks. The construction of these is really quite amazing.