I have just put my set of Bart jazz pu's on a brice douglas fretless 5. Sounds great but I really dislike the spacing. I measured neck at the nut and the last fret and it is just a 1/16" larger than a precision 4 string neck. I would love to convert this to a 4 string with 19 or 20mm spacing but the only issue that I have is in the 5 string Bart pickups. Are the pickups the blade type or do they have poles. I had these pickups in a precision 5 with 19mm spacing and now i now in the brice with 16.5 and both sounded great. Can anybody shed some light on this subject.