Finally got a pair of tracks I can work with...
Next up - the Hull!
I've printed it once, printed almost perfectly firat time - but I've had ot make changes to the model to beef up areas, I'll also print it the other way up. Problem is the fine vent slats at the rear are easily damaged then removeing supports so I'll print it the other way up.
That said - seeing as I already have a hull I might print a turret... so I can at least see the whole hting in one piece!