Just updating the thread: I got the Neo version and I loved it enough using the around-the-horn method, definitely helps take some of the weight off your left shoulder once you got the adjustment dialed in (although the strap itself, with straplocks on it, seem to add a slightly noticable amount of weight to the overall instrument). Loved it enough to take the drill to my Sadowsky to install 2 flushmount straplocks for it (I'm a big fan on flushmounts on the back of the horn; the strap sits on your left shoulder so much better, no cutting-into-your-neck feeling)...but I made an almost-fatal error (for the bass) of not telling my work colleague doing the install (woodwork teacher at my High School) that the body was chambered. Sure enough, upon installing the lock for the right strap, he fell through a chamber but luckily caught himself fast enough, so he did NOT go straight through the front of the bass...my heart almost sank when he hit the chamber! Now there was no wood to secure the screw and a big gaping hole, so he recommended using heavy duty epoxy paste to secure it, so that's what we did and it seems pretty snug so far.
So the guy said wait at least 4 hours (it's been 12 hours so far), but now I'm thinking I should give it the maximum cure time for the best hold under pressure from inserting and removing the straplock and hanging from the strap...except I don't know exactly which epoxy he used (and I don't have his number)...I've read times online anywhere from 24 hours to 1 week for maximum cure...any thoughts? Do you think it will hold over time? Have a performance on Sunday and would like to use the Duostrap, but don't wanna risk weakening the epoxy.