I put six studs in the forefoot 3 on each side and four screws in the rearfoot 2 on each side.
How to put sheet metal screws in running shoes.
I usually use a clamp on a table like a c clamp or a quick clamp of some sort to hold your shoe down as you really need both hands to hold the tiny screw on the end of the quick attachment to get it started.
I used one of my old pairs this way i can just keep the screws in them full time.
This was craig s early christmas present.
6 hex head screws sheet metal screws very inexpensive at any hardware store.
Craig first scores the spot with an x acto knife so it is easier to drill the screw in.