Yeah I'm just coming to this conclusion, I think I'm going to have to have an external bottom cup
I used a CK Inset 7 on mine. Others are of course available.
I'll probably just get the Nukeproof one on Wiggle cos it's a tenth the price.
@Brommers started
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Yeah I'm just coming to this conclusion, I think I'm going to have to have an external bottom cup