Yes I agree, I was kinda shocked to only see 2! I understand ca hinges need thin ca, I have put together a few arf's. But ca usually doesn't bond to hardened ca very well. So I will use epoxy there where I can only clear the slot out. New slots will have ca only. I believe I can get enough epoxy through a straw, or something without spending more money! But an aplicator aka suringe would be great.
Once I have some hinges, I don't plan on taking any more than 10 min! myself.It is no big task but I never thought of removing the horn and drilling through the hinge, thats where it should be in MHO.