I recently acquired a mk4/cmc6 set along with the a20 shock mounts, but find it extremely difficult to put the cmc6s in the a20s. It is really a tight fit, and takes significant pressure to push it in (cannot snap it in from above), and even removing it is really difficult. Is this normal or are these shocks abnormally tight? I'd like to use them but the tightness makes them essentially unusable. Any info would be appreciated, thanks.