Gee, wonder if that's tuned in 3rds.... oops - did not realize the train of thought here is 4ths.... per the first post !!
Big George W
East Derby CT
Mobius Megatar - tuned in Classic Stick Tuning [5ths/4ths]
M.Megatar Toneweaver - tuned in Major 3rds
Warr Phalanx 12 - tuned in 5ths [melody], 4ths [bass]
NS Stick Transparent Green w/Moses graphite neck, tuned in 8-string Guitar Intervals
digitech, T.C. Electronics, ART, Lexicon, GK, Markbass, EA, Bag End, Guild/Hartke, SWR, EV, Radial, Ampeg, Trace Elliot, Furman