I put Ultimate Bunk Boards on my trailer. I drilled countersinks with a Forstner bit and used stainless hex bolts with fender washers and nylocks. Doesn't help with getting the old hardware off but makes the next job easier.
2015 Seaark 1872 MV CC Etec-90
Two Helix 12 CHIRP SI's, , MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
2018 Robalo R180 CC, Yamaha 115
Bitter Gun Owner