I've had my Lull P4 for a few months now, and I love it more than any bass I've ever put my hands on. However, I have one small issue, and I'd like some feedback on it. I can not get the neck relief on my P4 to stay set for very long at all. It seems like it moves every week.
As a disclaimer, let me say that I am very careful to keep it out of extreme temperatures, and it always stays in the case when not being used. I do, however, live in the very southern US, where the humidity is always insanely high, and the weather changes constantly. But I take great care of my basses, and always try to keep them in a room temparature setting.
I always set my neck relief at around .012" (0.3 mm), which is exactly where I like it for my taste. I've been setting up my own basses for years now, and have gotten pretty good at it. I can set the relief on my 2011 Lull V4, and it'll stay put for a month or more. But it seems like the relief on my new P4 won't stay put for longer than a few days at a time. It doesn't move a tremendous amount, but enough to make me have to readjust it back to my preference. I'm wondering if it has to do with the fact that my V4 has a quarter-sawn neck, and my P4 has a flat-sawn neck. I wouldn't think that would be a big deal though, since the necks are graphite reinforced.
Does anyone have any solutions or ideas? It's not a huge deal, since I can always readjust before a gig. But it would just be nice for my P4's neck relief to remain as stable as my V4.