So I've got the Super Agata Bench capper. By regularly changing from the 26mm and 29mm bells, the male threads on the capper have stripped a bit:
Now, the 29mm bell (silver) still screws on perfectly, but the 26mm bell (gold) won't screw on at all. As it turns out, the inner dimensions of the 26mm bell is 16mm, whereas the inner dimensions of the 29mm bell is 15mm:
Anyone else notice this? As of now, I've been able to wrap the threads with teflon tape and the bell for the 26mm holds fairly well, but if there are 26mm bells out there with the smaller 15mm dimension, it would be easily just to buy a new bell, rather than try to fix the threading or a buy a new capper. The gold bell is the original bell that came with the capper.