the deal on this is a trade motivated by "health problems" if i can call them that. i have a very nice squier vm jazz 5 string but the weight is giving me some back pain after long sets (about 4 hours non stop). i also have a tendinitis on my little finger and maybe a 5 string is not good for that, sometimes my whole arm hurts up to my elbow due to the tendinitis. so i thought about trading it for another vm jazz in 4 string. it is lighter and also not that big of a stretch on my fingers in a 4 when compared to a 5 string. thing is a guy asked me to pick between a vm fretless or a yamaha bb414 (in olympic white, very nice). i do not know which one to pick based on pictures. i will have to decide when doing the trade, will have about 20 minutes to make my decision. i do not know the yamaha at all, never played in one. lets say neither one of those (vm fretless or yamaha) will add anything to my large collection of basses (9). i just want a beater bass (which my current squier is) the best it can be, confortable to play due to my tendinitis and back pain on long sets. the goal is to take the bass to the "risky" events, if something bad happens, it is just a cheap bass. your opinions? ps: despite basses are different in nature (fretless vs fretted and jj vs pj, both are useable for me).