Originally Posted by spaceman_spiff
If you use 5" long strips on all four sides of the frame (both sides of the strings at 3 and 9), and if your frame is wide enough to fit the 1/2" wide tape on both sides of the strings, then it's 6 layers in each position.
It's a fairly sizable stack of lead, but it's still doable.
I'm thinking of squirting something into the grommet holes. Travlerajm has done it with silicone but I don't think that will be dense enough for this project. Researching other materials.