Habe a Rem 20 gauge, 870 express with laminated stock. Nice enough little gun but doesn't have enough drop in the stock for m, certainly not as much as my 1187. Trying to figure out how to "drop" it some. I am not afraid of trimming it slightly where it bolts to the receiver, would be a pain to redo the in letting around it though. Any other options? Couldn't find anything on shims for it.