I'm one of those guys that couldn't get the UCA's to fit. I called Calmini about it and sent them pics that I took, they said the welds on the UCA's might have "walked" a little during the manufacturing, so they sent me a brand new pair, The second one still didn't work, so I gave up and ended up selling the UCA's for $150 just to try and recoop some of my losses.

Hope yours will work fine, but if they don't, you are SOL cause calmini will only send a new pair that is exactly the same. No refunds...