Sir Ian does his very similar to mine. Four holes, leather tab. I've punched holes around the perimeter of the leather and sewn it directly to my arming coat, though. I don't plan to wash it anyway; historical smells and all that.
Also as Sir Ian said, legs, you can point from the inside, and I believe in most cases should, especially earlier arming garments. Mine are pointed on the outside, but sit at the bottom of my arming coat, as it's a later period style and shorter at the waist than Sir Ian's (ends slightly below where his points are, I believe). Back with the longer, poofy earlier gambesons, legs pointed on the outside had some serious "flop". I think this is why the pourpoint/gambeson combo is so prevalent with the earlier period guys; it moves much nicer and with less slop than a single gambeson with OUTER pointed legs. Everything else points on the outside - shoulders, arms, voiders, fauld, etc.
I need to finish the arms arming points on my arming coat. I've been lax in it since my arm harness hangs from the gorget since last year or so. I put steel eyelets in, and then sewed over them with thread to hide the steel, while hopefully making it a bit stronger. I didn't know how to sew eyelets at the time and just did punched/steel ones.
It's on my "to do soon list" since the 1450s Italian armor I recently got points at both bicep and neck and it'll look silly with only one sleeve done.