@Brommers - a follow up question regarding that Mack rear hub you mentioned and which I'm about to order. One of the options is for it to be drilled for bladed spokes. I'm not sure yet what I'll be using, but way well go for bladed. If I go for that option, I assume I can use either regular or bladed?
You can use round spokes in keyhole slots, but you only actually need keyhole slots if the major axis of the bladed section of the spoke is greater than the diameter of the normal round holes. Modern practice is to use CX-Rays or DT Aerolites, which don't require special drilling.
@Brommers - a follow up question regarding that Mack rear hub you mentioned and which I'm about to order. One of the options is for it to be drilled for bladed spokes. I'm not sure yet what I'll be using, but way well go for bladed. If I go for that option, I assume I can use either regular or bladed?