RE: TBM 93
I removed the o rings on my retracts and wrapped thread tape (plumbers tape ) around the o ring grove then put the o rings back on.....was hard to get them back into the cylinder but once in there was no leaks .
Used vaseline to lube o rings when re installing.
Hopefully will have my Zero out again tomorrow morning & will try and get some video of it !.
Cheers.