You need to use a air stapler if you are going to work on pins. Especially for pf swaps. The ones posted in this thread will do, minus the Swingline lol. They are typically used for upholstery but work great for pins. You need a 22 gauge. Many lengths are available for these. You can a cheap ass pancake compressor from Harbor Freight if you're on a budget.

If you are swapping a CPR pf, the wood they use is harder than original. Probably a hard a maple. With a manual stapler, you might end up with staples not fully seating. I tried using a manual when I first got into pinball. I was swapping a CPR Xenon and it was a disaster with the manual stapler.