I’m thinking, as I don’t see it having much regular use, maybe use what I have and if they break, just replace them. Might be more expensive but not that expensive really. I have no real need of boxes of bits as spares albeit I have a few for screws etc.
Buy a set, preferably with more than one of each size, that way you shouldn't get caught out!
I only ever really use PZ2 for wood screws and PH1 for drywall screws. Torx are great but the multitude of different bit sizes does my head in. So I just buy a pack of PH2 and a pack of PZ2.
I’m thinking, as I don’t see it having much regular use, maybe use what I have and if they break, just replace them. Might be more expensive but not that expensive really. I have no real need of boxes of bits as spares albeit I have a few for screws etc.