I do the same cut them after the bride is on. But I cut slots as well as I do not like using slotted bridge pins. If you don't you only have slots in the bridge and not the top and bridge plate so you would have to do it again anyway after the bridge was glued on
I know why i don't do it- cuz i don't drill the holes in the bridge all the way through before gluing the bridge to the top- so glue doesn't squeeze out the holes
If using the string through method ..Why not just drill the bridge holes at an angle to start with..it requires a simple bridge drilling jig.View attachment 112338
yerrrr...... you could do that, but then it makes the threading the strings through it and into the gem stones that i use on the inside problematic.... + it's simple to do these ramps. So no for me.