TackleTour

I'm talking about this.
http://www.rofb.net/faq/faq_inline_spinner.htm
To me it looks like it's gonna twist even more violently by having its center of mass offset... I thought it'd only work under very slow retrieve with little or no current. Has anyone tried this method and come out with a good result?

Oh, and is the Blue Fox Vibrax really twist-proof? They claim it's got an anti-twist feature but I've seen a couple underwater action footages and some twisted while some didn't.

I'm interested in the answer to your first question (bent shaft), too--and if someone has a lot of experience fishing such a modified spinner, I'd like to know if there was any difference in catch rate vs. straight shafted spinners. Fifteen years or so ago, I tried a spinner sold with a pre-bent shaft (might have been an Eagle Claw) that didn't twist line...or catch fish.

As to the Vibrax, I can say that the #2 original style, no hair on the hook, does twist light (<.009") nylon monofilament line.

It's the same reason jig heads for swimbaits with the line tie on the top of the head don't cause as much line twist. The center of gravity is way below the line tie.
Nothing is fool proof, but this is pretty good.

I cannot answer your question - I will have to try the method.
Still, if line twist is an issue maybe this will help:
OWNER 52459 SINKER HOOK W CRANE SWIVEL
- I use spinners a lot - Mepps, Ilba, Mapso/Lukris, Panther Martin, Vibrax etc. - especially size 2-3. These owner snap/swivels have been great for me.

And no, blue fox vibrax is not twist proof. Some spinners, e.g. Savage Gear Caviar (only "ok" in size3+) cause less line twist than others but none are twist proof as far as I know... The snap/swivel solution is not twist proof either, but it helps a lot imo.