TBers. I need your help in identifying an excellent San Francisco Bay Area Luthier with experience adding frets to an unlined fretless bass. The bass is a very high end boutique and the board is unlined so the Luthier must be excellent. Also, any thoughts on fret size and material? Jumbo or regular? Stainless steel or nickel? Certainly frets or no frets GREATLY affects tone. But what about fret material or size or height?