Update - did the spring adjustment and only had one brick after playing maybe 10+ games (trying a bit to nail those bastards!). Seems better. I did 10 loops, could probably have gone up to 15 maybe? Really easy to do, thank's for everyone's help. It really makes a big difference in SFMB as that was when the heavy bricks were really noticeable.
I also adjusted the targets to sit more flush and the back does sit maybe a hair lower than the PF but I hope it will be fine, I'm concerned it could start to wear but I think its minimal risk.
Running 1.11 and haven't had any issues relating to code - game seems more open now, even the wife commented its more fun. Disabled the mode time out, but kept the mode continue settings - love it.