congratz on the set . A true machine when built :-)
I bought one used ( well, built and shelfed ) last year. And I took it apart to have a look ,and to install a better track tensioner. I got one from Henntec for the tamiya Leo, so you can adjust it from the outside.
Trust me, once closed up , it takes a while to get down into the belly of it again .
I also invested in a better AB gear to last year, after going the cheaper rute first. That compressor lasted 3 Month before it became so noisy , I could not take it anymore .
I went with a sparmax (TC 610H) Compressor and 2 AB's 0,3 and 0,4 mm . Superhappy with that brand . I spent a little more than calculated , but for laying down paint on 1/16 scale It's nice to have a compressor with a 2,5L tank . So it's not running all the time .
When coming to battery, it's really tight in the turret, even after you spent a weekend on the wire layout, hehe. with a heavy nimh ore nicd , the back of turret can sag a little, so I went to my LHS and got 2 lipos , the smalest in footprint in 2s , with the most mah in them ( sadly not more than 2250) and a small lipo alarm. so yes , not the longest drive time with those, but no problem fitting it in the turret , and no sagin.