Slowly the saw is aproaching its finish. Tonight I drilled the screwholes. After deliberating about the best position, as far apart as possible without interfering with the sawback or the chamfers, I drilled a very thin drillbit through and through. This is my pilot hole for all further bits. Starting with an 11 mm one for the screwhead. Then 6 mm for the square shank and then 4 mm for the threaded part of the screw. Then turning the handle over and do the same from the other side. The pilot hole is essential to get both sides in line with each other.
I make the square hole with a small chisel. Fist removing a bit of wood. Then hammering the screw into the hole, so it marks its own hole. Remove the squashed bits and repeat until I have a nice tight fit.
Tomorrow I'll drill the sawblade with a HSS-cobalt bit which works a lot better then a normal HSS bit in springsteel.