This isn't unusual for a fair number of stocks - not just Manners. They could shorten the cheek riser, but then you've got... well... a shortened cheek riser.
I don't find this to be an issue at all - the only time it comes up is on my rifles where I can't eject a loaded case due to its length (thus requiring a bolt pull). I ended up putting a shaft collar around one of the posts of all my cheek risers so I can pull the piece off and quickly put it back on at exactly the right height without worrying about the snap clip shooting off.
And I have probably half a dozen 3/16" wrenches in my range tool kit and spread around my range bag...
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