So the blocks GM installed to hold the top down are useless remove them but then buy a top blanket cover to protect your top as it moves when stored.
Not sure but something about this seems odd, let me think about it and maybe it will come to me.
But for now I am going to remove my brakes as they seem useless to me, then I am going to install an anchor that I can deploy when I want to stop.
The blocks are actually worse than useless, because they really don't do anything positive, and have been known in many cases to wear holes in the top.
I understand the perceived need for them on the part of the designers and engineers, but it was one of those things that really wasn't needed, and didn't work out.
A top blanket does keep fibers from the trunk lid liner from getting on the top, but of course that is the case with or without the blocks, so the two are not related.
I drove many miles with no blocks and no blanket, and saw no issues. I do now keep the cockpit cover folder over the top, but only because it is the most convenient place to keep it.
The anchor idea intrigues me. I hope you will post some pictures and a review of its effectiveness. You will reduce unsprung weight, so it should work well.