just put flats on the bongo!!
just put roundwounds on your fretless!!
eb customer support:
E-mail:
musicman_customerservice@ernieball.com
Telephone: +1 866-823-2255
trussrod adjustment:
Click here for an image!
less relief / flatter = lower action
more relief / bow = higher action
do NOT use cheap tools to adjust with. they might break and scrape up your pressious!
also, if you are lucky enough to have a 100th namm sr4: the truss works the other way around on that one!