I was going to submit a PR, using the IMC fix mentioned here in the same vein as the Chisel compatibility code you've already got, but I'm not familiar with forge, and couldn't seem to get it working. Hardwiring BlockXtone#isFullBlock to always return true lets C&B recognize the blocks as modifiable, since that's what it's actually checking, but I'm not sure that that really counts as a solution...
I was going to submit a PR, using the IMC fix mentioned here in the same vein as the Chisel compatibility code you've already got, but I'm not familiar with forge, and couldn't seem to get it working. Hardwiring
BlockXtone#isFullBlock
to always returntrue
lets C&B recognize the blocks as modifiable, since that's what it's actually checking, but I'm not sure that that really counts as a solution...