Like any acquired skill, if you stop using it your proficiency goes down hill quick. At my airline if you haven't flown for 60days you are required to jump in the sim for training.
So since i'm getting back to working on the -8 for the first time in well over a year, you can imagine my reservations about shooting rivets again. To make matters worse my first rivets back are the wing ribs to the spars.
So I decided to take out the scrap pieces I used when first learning. I bucked and drilled out about 20 470 rivets before I was ready to take on the ribs and spars. Very happy with my results, nothing to drill out and not a single