right. you do not need an inserting tool because these are solid inserts, not wire ones.
job one - how to ensure you are perpendicular to the original hole?
screw in a standard pedal tap and clock up and down and also around to get it flat and also concentric. i managed to get it better than 0.02mm so i can live with that. took a long time though.
then place oversize tap/reamer in with sprung centre to apply some pressure and ensure it doesnt go wobbly
screw in insert
now to cut to length. i have been thinking about this. the insert wants to be 0.5 to 1 thread below the face the pedal pushes up against, so i need to cut it down accurately.
use a pedal axle - found a set of v12s in the box.
lathe is being used at the moment so i'll go and walk the dog and do it later. i reckon either loctite, or peen it to stop it moving. or both!
i will find an old BB, put it in the lathe and measure the pedal axle runout once done to see what's what when done.