"Can I ask if there's any particular reason you want the world's greatest 3" driver? Cheap? Cute? You're doing a Sesame Street "Number 3" show?
Or you just want to bung it in the hole in the front of those norh drums?"
Yep, I'm just taking out the TB drivers and putting in something else just for grins. I know that's below you as far as technical difficulty, but for me this is as close to DIY as I care to get

That fostex looks interesting......
Thanks