I've always just used angle adapter clamps (the ones that screw in from both sides) and then bolted channel or a sled) to them.
Sent from my iPhone > On Mar 29, 2018, at 4:57 PM, Steve Jones <[email protected]> wrote: > > https://www.perfect-10.tv/WebStore/ProductDetail.aspx?ID=8201 > > Has anybody used these? do they fasten pretty well?
