Has anyone else had problems with new pinball rubbers splitting as you put them on? It is only occurring with the wee small rubbers, size 23-6535, it's almost like the hole in the centre isn't wide enough. The diameter of the rubbers matches the ones removed, as per pic. I've flicked an e-mail to the company I purchased them from. Partner is even looking at drilling out the centres a bit before putting them on, but he shouldn't have to do this. Maybe a fault with the rubber? All the other rubbers in the kit have been fine so far. Just these smaller ones keep splitting (15 of them in the kit).