Sorry guys! I missed that first part about staying attached! Don, is 100% correct in that it just snaps on and just pulls off, once adjusted to the drum you need not make any further adjustments unless you want to occasionally tighten the block.. The block is made of black Delrin on purpose to be sacrificial and will get beat up a bit from on and off... but the guys who have them will attest, it makes the whole set up much more stable during the loading process!! ....
.... best to you all, til...lat'r....GT