Drilling into the body?

[ctmullins]

Nice work!

 

[Matt Liebenau]

Good job. You can wick a couple of drops of thin CA glue around the edge to help prevent any further chipping. Obviously you’d have to remove the pot first.

 

[tubatodd]

Added a new set of cheap knobs. Very nice quality.

 

[Major Seven]

Take 2:

This time I busted out the protractor. In my 20s, I was a both a high school geometry teacher and assistant band director. That was 18+ years ago. If I didn't try to do this mathematically I guess might have felt my positioning was not precise.

First:
I measured the distance of the adjacent holes from their centers, with the protractor. I then made an arc from the center of the last hole to where the new hole would be going. I used painters tape to center the pointy end of the protractor.

Second:
I measured from the center of the first hole to the center of the third hole. I then made an arc from the second hole, to where the 4th hole will be going.

Modus ponens!!!!

The intersection of those 2 arcs should be the exact point where the new hole will go. Now I have to measure twice more and drill.
View attachment 7223413

View attachment 7223412

In Euclidean space of course.

 

[easyj]

Added a new set of cheap knobs. Very nice quality.

View attachment 7227576

You, Sir, are a MADMAN. I would not have the guts to do this to my red SB4. It looks great! Do you like the jatoba fretboard better than the maple on the red one? I think the blue looks really good.

 

[tubatodd]

You, Sir, are a MADMAN. I would not have the guts to do this to my red SB4. It looks great! Do you like the jatoba fretboard better than the maple on the red one? I think the blue looks really good.

It was actually very easy. I have a red one as well and if I get another 4 knob preamp, I will likely be doing this mod to it.