I can now post here so I wanted to see if you found out any new info on your case???
like I said before, I had overcharged an r410 system and it started to shake, rattle and roll something bad.
we pulled some out and it calmed down...I was surprised to see an over charged system act like that.
BTW...I decided to play around with my charging scale by adding factory charge weight right away, instead of just adding to bring it up to pressures...it didn't work very well!!
Perfect Practice Makes Perfect