ive messed around with pin setups to see what works best, ive found this works best
ive had to go without any pins on the outside of the pedal on the top but the pedals are already plenty grippy. the two bolts that are there have the nuts facing down so the allen key bolt head is on the top and still usable. also, having the nuts there means you have to grind them down with the plastic, which slows down the wear on the pedal (cos steel takes ages to grind down).
i mostly grind on pegs but i like doing front pedal grinds on ledges which over time does thrash my pedals. ive only replaced like 2-3 pedal halfs over the last 5 years though so going pretty good (pretty crazy ive had these pedals that long, never thought that was even possible for them to last so long).