Boost spike was snuffed as explained, it was a known issue but I ****** it up when adjusting by going the wrong way. Spike is about 23 now and regulates at 21.5 as per the programmed map. PID tuning can smooth it more but not a concern atm.
Detcans give zero audible knock at present, but not willing to screw more timing in until on a dyno and can actually concentrate on listening for it, rather than steering and tuning the wireless.