But he didn't take any pics of the fitting process, and as I've just done one of these, and taken pics, i'll show you mine.
I didn't make a plaster cast for this one though - the bass is no Testore, and the belly was quite strong - so I rested the belly firmly on a sandbag for carving and clamping.
This is the soundpost crack – going off in three directions. i glued this up first.
Then on the other side of the plate I started carving:
in the next pic you can just see the back of the crack peeping through. the belly is now about 2mm thick in the middle.
for clamping, i've improvised a miniature go-bar deck. I prefer this way to using c clamps and it allows me to apply pressure where and how i want.
The finished patch. Not a patch on Kurt's, but for this lower-priced bass it'll do the trick and get the bass back playing again.
Nice job, and thanks for posting the pics! I'd like to find a bass to try this on, but it seems around here that even beater basses are going for quite a bit of money...
Nice job Matthew.
It might be worth your time to make a handle for the glass. Doesn't have to be anything more than some scrap wood with a rabbet let in to hold the glass. Hope this helps.