The general consensus right now seems to be that all the Happ Perfect 360s made in the last year or so are fucked up - our local arcade tech mentions how he fixed one. This is obviously out of your control.
The best solution where possible is probably to go back to older p360s if you have them laying around. :sad:
That being said, whatever crunchy/tight spring p360 you have is probably the best anyone can get right now, so people kinda have to learn to love it. :sad: