Thanks Jazz Bass Guy, Very interesting!
I think this is the type of case I initially was trying to get away with, but now that I see pictures - I need to ask you:
Do you really trust the baggage handlers with your bass in this case? Have you seen firsthand what cargo is subjected to?
Looking at these photos, I predict that the latches (with only a couple of rivets each into thin plastic) will be pulled apart very quickly. If (or likely "when") that happens, the bass has only the gig bag for protection. Not the level of risk I can afford to take, or peace of mind I would personally bank on.
I get hired to play bass, and when I get off the plane at a destination, I know that with my hardshell case, the chances are exceptional that I will have a bass to go to work with - not pieces to reassemble on an emergency call to the local luthier!
Your title "cheap case" is just that, and you get what you pay for. Bravo on the creativity, but IMHO this case is a disaster waiting to happen.
As for the Full Circle,
Yes the string position of the pickup/adjuster affects the type of sound. It's not radical, though - so you can probably get the right end result by working the amp EQ if the string height luts the angle of the pickup in an other-than-ideal position. I have been lucky so far getting both the sound & height where I want them. There are probably a few posts dealing with this specific issue in the Amps, Mics & Pickups forum.