OK, had a good day today. Hit 11 greens.
I used my previous set of irons, with 80 gram graphite instead of the 64 grams I've been playing. Pretty big difference.
I might try the lead tape on the shafts again, but another time.
Right now I'm liking where this is going, and I plan to get my FST 90 set built. Somewhere in that 80-100 gram range is my sweet spot, I'm pretty sure.