I’ve seen your cranks somewhere in your videos with many holes drilled & tapped… What can you tell us about them? . Is that something you did? Or a professional? Is that something I can do in a vise with drill bits and a tap?. Was it successful, or a failed experiment? What would you recommend?
I’m a relative newbee, but currently have 20" fat tire, 26 Muni, 26 road, and a fresh purchase of a 36" night fox.
For a quality job at least a drill press would be required for drilling and highly recommenced for tapping the threads. In quality taps there is a small hole in the drive end that can be used to perfectly align the tap with the hole.