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I can't quite picture this...
Can you post a picture? Regardless, using biscuits on a 30 degree miter may prove difficult. A full length spline would be better and easier in my opinion. IF you have a good means of securing the boards at that angle, you don't even need a spline. You just don't want the edges to slide as you apply clamping pressure.
You may have to fab up a jig to make the clamping go well....
Can you post a picture? Regardless, using biscuits on a 30 degree miter may prove difficult. A full length spline would be better and easier in my opinion. IF you have a good means of securing the boards at that angle, you don't even need a spline. You just don't want the edges to slide as you apply clamping pressure.
You may have to fab up a jig to make the clamping go well....
