I have not been able to finish the one I got of ebay yet, but it has a broken topdeck. The deck broke right behind the steeringposts. And the topdeck itself is impossible to find for a reasonable price;so you may consider strenthening it rather than look for a spare.
What material is your front shocktower? It seems to have been available in 2 or 3 versions.
Another area that I've picked up complaints on are the suspension arms... and the front bulkhead was broken on mine too; in several places actually.
I plan to add a brace over the hingepins in front of the bulkhead to make sure it'll live longer and have tapped the upper screw holes all the way through to use longer screws.
I'm replacing the suspension arms with HPI arms from some truck. They are softer = less brittle. If you break yours I can sell you my originals
