Pardon the misspell !
I made my own buying O-ring material and special silicone glue from McMaster- Carr. I don't know how it would compare to the TT-Weights product, but it didn't cost much to try. I have a heavy platter Lenco and didn't hear a difference using multiple rings. I do always use the TT-Weights clamping ring to flatten records and sometimes improve tone stability though.