Is there a place you can get the Harpa in the US?
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If you are still looking for a solution, xDeep has a kit that is used to modify hog type systems to adjustable shoulder straps for $39. The kit contains the male and female buckles, triglide, and some strap material which is flexible enough to go thru the buckle.
View attachment 489887 Then there is @Akimbo idea for PVC tube additions to sliders to let webbing adjust more easily. I made a bunch of these but they are a bear to install FYI search Scubaboard for akimbo rollers.
I made something very similar to the UTD system and just have it on one side. Works for me but I may add one the other side as well.I have been looking for this exact solution. I just randomly came across UTD Quick Adjust on youtube when i was watching a video about another system. Does anyone have any experience with the UTD system?
UTD Quick Adjust System · UTD Scuba Diving
Photos? Also, pm your address and i can send you a couple of the ones i made. And you can see if they work better for you. Then again, the type of webbing you use might be heavier or lighter than mine. But the thickness of the pvc made it tough to get the $&@&$$&@ d-ring into the space.What do you find problematic about installing them?
I just bought some PVC electrical conduit in a couple different diameters and am experimenting with this. I have some compact 2-inch D rings that I am using. I didn't find any issue getting the D ring in the conduit but the thickness of the conduit I am using is not as thick as what you depicted. So far I am also finding that it does not really tighten or slacken very smoothly. Two other things I have found is that the smaller diamter conduit is worse than the larger diamter, and wrapping the conduit in electrical tape after mounting the D ring does nothing to make them work better, in fact it gets chewed up rubbing against the slots of the backplate and makes movement worse.
-Z
Photos? Also, pm your address and i can send you a couple of the ones i made. And you can see if they work better for you. Then again, the type of webbing you use might be heavier or lighter than mine. But the thickness of the pvc made it tough to get the $&@&$$&@ d-ring into the space.
Compare to this conduit that I got at Home Depot: also I used a deeper d-ring. I put a tape measure to give an idea of scale. The conduit has to be less than 2” to spin on a 2” d-ring. I will include one on the d-ring and one off, you can switch out for your own d-ring, but try this gizmo out for yourself before sweating about making more because the thicker conduit is not cooperative.