@James: Yes, 4 & 5 parts sounds quite likely for Singapore.
Alex
biggest problem is if your level capped say in pro level 12 meaning u can only produce 12 parts per race yet you need 20 parts per race meaning eventually all level capped teams will eventually not have enough parts to run more than 1 car.
No I don't think so, since both the main factor determining how many parts you need, the level of Design, and the source of parts, Manufacturing, are restricted the same since they are both HQ buildings. So they are either both hard capped at those levels or with soft cap not capped at all.
Problems keeping the cars repaired arise if the same level for both Design and Manufacturing always results in a too low parts production and perhaps at certain levels if rounding causes a raise in part needs for too many tracks at once after a Design upgrade while manager level cap is preventing a quick solution by blocking another Manufacturing upgrade.