What ever happened to throttle control? Don't want to come on song, don't put your foot down. It isn't binary made up of 0's and 1's, throttle wide open or shut, mashed into the carpet or off it.
I had a bit of a sniff around, the 6262's largest (only) rear in split form is the 0.84. Its only the 6266/6466 that has the 0.84, 1.00, 1.15 and 1.32 AR
It won't be floating. I run the same cams, springs and retainers and have given my setup 30 psi. Not sure how much more boost you want to pull out of it. It's dropping to 18 psi as is.
Never had an issue. Even down at Cootamunda in the middle of winter, left outside at the hotel. That was bloody cold that morning too. Get the tuner to do a PROPER cold start.
Have used a Jaycar trickle charger on my R33 GTR for the past 8 years. I come in, open the boot, plug it in and walk away. When I want to use the car I'll unplug it and drive off. Never an issue.