Please tell me how to properly slot a banjo bridge; tools, technique.
As you can imagine, this has been discussed extensively. If you'll search the archives for bridge slots, you'll find many helpful discussions.
Bart Veerman has some great info on his website, link below. I personally use slotting files, after graduating from the welding tip cleaners, and then follow that by using a string of the same gauge that will be used. My reasoning behind finishing with the string is that when you tighten the strings during install it actually does some "slotting" or wear, so I like to make sure nothing changes after it leaves my hands.
Edited by - DSmoke on 08/30/2021 17:52:49
I use nut slotting files to provide a smooth, rounded channel for the strings. I do not feel the need to match each slot to the string gauge, however. I like a .024 for the 4th, .020 for the 3rd and .014 for 1, 2, 5.
I have recently purchased two sets of slotting files, but for years previously I used a hack saw blade that I ground to a taper on my belt sander--thin to thick for various width slots.
'Martin DR Centennial' 2 hrs
'1989 Gibson Granada' 3 hrs
'Blackberry Blossom' 4 hrs