I have 2 Yamaha BB's. My main bass is a BB415 bought from another member here for £180, which was modded by The Bass Doc to take a John East U-Retro & an 18V battery box. Currently strung with D'Addario Chromes, it is, to my ears, a tone monster. It also fulfills all the points noted above about the BB414 despite being a 5er.
I also have a BBG5A - the smaller body BB with 24 frets bought from a callow yoof off Ebay for £90. It has a wider neck ( this is more like a P bass, the 415 more like a J bass). I have swapped the P-type-in-a-soapbar pickups for the double-spool humbuckers found in the RBX375 & others. Deep, velvety & hammer-like. Amazing pups for recording as they are exceptionally buzz resistant.
Both cheapos and once set up the way I like, play magnificently with oodles of tone.
The BB415's the Guv'nor tho'. Fab bass.
G.