I tried Badger and there support has gone down hill of late. 4 difernt emails no answers to replies, called, I guess they only have one tech and he was at lunch, and goes home at 3, so what does that tell you? I ordered the R-081 as I saw on the lid it stated 29/32 and that's close to the rk1 cup size, so we will see if it fits. Thanks for the reply.