I ground a bit from the tumbler stop, but was careful ot to remove too much, allowing the springs don't run too low in the lock mortice at full throw and split the stock. A 1 minute job - maybe two.
The original owner filed out the rear sight for a deep but open V sight. I replaced the rather large front bead he had with a smaller one, just for target shooting. I'll replace the larger one for hunting. Standard Marbles narrow base bead sights. A Sheard gold bead would also be a good sight for hunting.
Also, both sights are in line so perhaps this gun does regulate with 100yard and 150 yard zeros. Dang cold weather - with wind -30 today. Too cold to shoot.