I wood if I could.
Join Date: Jul 2011
Location: Lakeland, Florida
I'd imagine you'd probably want 1/16 or 3/32, maybe even as thick as 1/8 but, in reality, the gauge you go with will depend on the clearance in your joint. Take into account a slight counter-sinking. You want the joint tight enough to hold together under its own weight, at least. If you have to force the joint together (remember to use cork grease - or chap stick in a pinch) you can always sand the cork down a bit with fine sandpaper after it's contact cemented in place to reduce its thickness. But try to get close with the cork gauge instead of just buying the thickest and sanding to thickness. Too much sanding risks tearing out pieces of cork.
In worse case, you could buy more than one gauge and see which works best, though that could get expensive. I think a clarinet, for example, typically has around 1/32 to 1/16 or so of cork thickness sticking above the slight countersink. My figures may be a bit off but a trip to your nearest music store to look at a clarinet joint in person should give you an excellent idea of what works well. The tried and proven method.
And yes, the cork would go along the outside edge of the insert you're talking about.
Last edited by Chaincarver Steve; 09-02-2011 at 10:10 PM.