signcutter-I presume you have the B3+ if you use the throttle. Before I can maybe help, we need to know whether you have the older forced idle switch(similiar to the 120) or the ASB 2 microswitches setup. If it is the older then you need to set the switch so it reads the running surface of the twist grip-with time the little wheel wears and you need to set it closer. other than that there is no rigging you can do on the older or if you have the 2 forced idle micro switches.
As for the blade pins. I have seen it on 350's that fly hot and high at high power settings. my guess is at some point the blade offloads itself in the sleeves as you do when you remove them allowing the pin to move. Just lift the blade and push them back. this is why the tie wrap on the baby pin is critical as a 3rd locking mechanism and the engineers need to ensure on blade pin inspections that the wire lock pin actually positively lock the pin when inserted. The baby pin is the secondary locking mechanism.