Lukasz Budzynski said “What I had on my mind was when cleaning the space between the pins. How is the chopping done, not to mar the pin walls? On my diagram the area giving me the issue is colored in light grey. What I do now is chop down from both sides the width of the narrower part of the tale (yellow) and then pare the remaining triangle with the chisel (orange). Is that what you do?”
I tend to chop the bulk between the pins from either side of the board before angling the chisel side to run parallel with the tail and paring alongside the saw kerf to clear away remaining waste. 🙂 Using a finer chisel will help reduce the degree of hand pressure needed to push the edge through the waste timber whilst paring and therefore aids control of the tool during the cut.