Alesis Drum Heads for sale! Only $1.00 each! All done with the conversion.
A few tips...
-> Get some Spray adhesive. The slit you cut can be glued back together.
-> Use an old Cotton t-shirt (thin material) for the top of the foam (between foam and mesh)
cut approx 1/2" more material than the foam, to wrap around the side edge of foam. Use spray adhesive to hold.
-> place shell in first and use as a guide
-> 10" heads: the foam above the piezo/plate does not need to be trimmed.
-> When cutting the white foam, draw two intersecting straight lines, connecting the indentations. This will give you a center point for tracing a CD sized hole. (using a CD is a great tip)
-> I had trouble finding thick foam for the 10". Found 6mm in a 9x12" sheet, but none large. However, I did find 3mm larger sheets. So, I spray adhesived them together. It worked fine. (fyi, 6mm is about the thickness of a mouse pad)
-> Use sharp scissors.
I haven't played yet.... but I can tell you the kick is super quiet, while the other heads are a bit louder than the kick, especially when hitting the patch. Now my surge cymbals are quite loud. lol
See pics below: