Work stoppage due to extremely sore fingertips from seating plastic edging into the hooks deep in the seat's foam. But I have a solution for that:
https://www.amazon.com/dp/B008MY3VU2
Liquid Callus is chiefly used by guitar players, but it should be standard equipment for installing Lseat leather covers. The installation takes a toll on one's hands in general and fingers in particular. My Liquid Callus won't be here until Saturday, but I have plenty of other things to do in the meantime.