An inexpensive little miter box makes cutting them off to size a 3 or 4 stroke affair. I should mention that I saw a guy doing pyramid pegs this way and thought "what a hassle". The truth is that it goes very quick and allows you to compensate for any anomalies in depth if required. Live and learn.
A bit of glue and I position the oversized peg in the hole. A tap with my custom peg-pounder sets it tight. The grain runs long-wise and the piece is very much like a bundle of soda straws. It compresses into the hole with a very mild smack.
If I do it right I don't have and follow up work at all. The end grain takes the finish in a way that creates a contrast that I like. I tossed the pre-made "ebonized" ones I made earlier as they were just a bit too fussy ;-)
I've got the two bottom drawers to go but, I think I am done for today. This has been a very entertaining piece so far. I don't know why it took me so long to start it .