I have a Shuriken as well. My plink is observed on the 6th string low E. I guess it's a common problem with all variax's. With a change of strings to .52, it has eliminated the problem. But a bariton scale and a .52, you would have to tune low and compensate using the software. Not too keen but that's the solution I guess. I'm keen to swap out the exisiti g piezos with graphtech ghost piezos to try and see if the problem is with the piezos.