here is a top tip for hammer stop removal
get one of these, fit it over the hammer stop and tighten, this allows you to pull on the stem so that you can grip it with long nose pliers, then you can easily unscrew the stop. It causes no damage and makes things a whole less awkward
this is a stock photo of an er11 collet chuck, they can be bought including a full set of collets for a few dollars off eBay
Bb
get one of these, fit it over the hammer stop and tighten, this allows you to pull on the stem so that you can grip it with long nose pliers, then you can easily unscrew the stop. It causes no damage and makes things a whole less awkward
this is a stock photo of an er11 collet chuck, they can be bought including a full set of collets for a few dollars off eBay
Bb