So long long ago, (like 9 months) we made this spinner called the Modulator. It revolutionized the spinner game. We sold quite a few. We made lots of accessories. Then we reengineered the whole thing and made it better. We still have some of those accessories. Buttons Weights Cogs Brass Stainless and Aluminum. The weights will fit an MK2, the rest will not. Own an MK1? Show it some love with new parts!! Only have an MK2? Take a gamble! It will be fun.