Thanks for that, I did actually buy one and the GK2A pickup. After much fiddling, poking adjusting and measuring, the thing works great. It is as you say very heavy but it's worth it. The really good thing about it is that you can take a solo with the nylon guitar sound without the usual feedback, tinny sound and having to pick uop anotherguitar in the middle of a tune. Very impressive stuff I say.