well first of all, i had no idea where to put this, but picks and strings count as gear and accessories i guess so...

ive had pick slipping problems ever since i switched from 9 gauge strings to 11 gauge strings, would the added thickness to the strings be the cause for my picks to keep slipping from between my thumb and index finger?
Pick droppage is usually the result of a very light grip. Hold that sucker a bit tighter. Try out a whole bunch of picks. I used to drop em all the time, then I started using .88s. Try as many as you can, youll find one that you like.

Problem solved....
1981 Gibson Les Paul Custom (Black Beauty)
1980 Marshall JMP 2204