I've run into this problem myself. First if using a hard tail bridge try cutting a thin piece of wood the same size as the bridge. You could also do the same if your using a wood bridge. Just remember to glue the wood together so it won't come apart when you change strings.
Oh yeah, I wasn't thinking about hardtails.
MGB sells 3 and 4 string hardtail shims if you don't want to make them yourself (scroll down to the bottom of the page).
Hey Brent, is that a trick question? Haha, or a typo? How do the last 2-3 frets touch the pickup.
My two cents worth: I shimmed one today with two pennies.
MSG has spacers on the way to correct these four, how to correct in the future? Raise neck/fretboard?
Thinking of what can be done on future builds to prevent the need of bridge spacers.
I always have the thickness of the fretboard (1/4") the height over the lid but noticing pics from Snowden Guitars, he has thickness of fretboard plus an additional fretboard thickness by raising neck.
Is this a good alternative or are their other options?
See image below
Hi Brent, WARNING the following my contain what could be seen as rules, sorry 'bout that.
There are a number of ways to get a bridge set at the best height. A higher bridge will contribute to better sound/output.
The first method is to draw a plan, side view of the instrument, and plot the string projection from the nut to the selected bridge height. The way I see it is ,if the bridge is at the height you want but the strings are too high or too low then adjustment to the neck is required. Either raising as you mentioned or changing the angle out of the body/box. Straightedge #1 helps here.
I normally use a more hands on method, and use physical jigs as shown here. I have pic's of them in use but you should get the idea from looking at the photo's
First the plan idea....
# 1 shows bridge height, adjust neck until straightedge is level on fingerboard.
This one has a fret and a screw that simulates string height, for unfretted board.
All a bit rushed sorry, hope it helps Taff
Looks like rocket science
Is their an optimum string clearance from lid?
Hmmm, I think break angle of the string over the bridge is more important. I like the strings far enough off off the top so that I'm not continually hitting the top with my pick or fingers. I could suggest a banjo bridge height as a guide 1/2" or 5/8".
Check this out, it my help? Pretty simple
Once you get one done you’ll have a working formula to go off, you just have to knock the first out of the way to get there? Good luck