I'm looking to buy a new Hock blade to upgrade my Stanley 60 1/2 low angle block plane. My plan is to have a blade ground at 25 degrees for 37 degree low angle work, and a second blade ground at 38 degrees for 50 degree high angle work.
I've read a fair amount that A2 shouldn't be ground at less than 30 degrees because of edge brittleness. Would it make sense to use O1 for the 25 degree blade and A2 for the higher angle?