Is there anything I can do to make the grabbers hold a bit tighter? I was thinking of trying to paint the inside with that liquid rubber in a can or something?? Any other thoughts?
I had the same issue recently. Had an old Apex quiver that held my 340 Gold Tip arrows. Switched my arrow setup to the Black Eagle Deep Impacts and they rattled like crazy in it. Ended up finding a nice Tight Spot quiver on Rokslide for cheap and now have zero issues. The neat thing about the Tight Spots is that they have the ability to adjust the arrow grippers individually.
Current Quiver is a Champion. Really nice quiver and has laste for a lot of years. Might try the rubber band trick. What about the Trophy Ridge Lite 1?
Solved mine with some black plastic electrical tape. Tried it first on one arrow slot to determine how many wraps would give the right amount of adjustment to the fit. Then measured the length and duplicated it for the rest of the eight-arrow quiver. Worked great and I'm still using that quiver twenty years later, with the same tape still wrapped around it to shim the arrows out to where they get a good fit.
Worked best for me to slice into the roll of tape to split the tape into two narrower strips before peeling off the strips off alternate sides as I used them.
Russell's idea above would pobably be quicker and also pretty much free, and if I'd thought of it back then, I'd probably have tried that first.
And now that I've become more aware of the many uses of paracord, I suspect that would also be good alternative material for the wrapping.