3 or 4 return rollers:
Some rivet counters might say that the Ausf. J had only three return rollers and not four. They will also say that the return rollers and road wheels were all steel types (no rubber). They would be correct, but not fully. The early Ausf. Js had four return rollers, and both the return rollers and road wheels had rubber. This means Sprue A works for this set.