i know that the first batch of swifts, had problems, with build, everything needed to be tighten, and washers for the difs, the swift that i have seen in acton was from the 2 batch for schu, (all purple finish), after one day of off road acton, big jumps. everything was all ok.
not sure about long term tho. engine seems strong, but i noticed the engine is hard to start up.