Does anyone on here have a kane prd1 or an Anton aprv1? Are they any good? Are they something I could make myself for cheap? They look just like a t with manometer hose and a thumbscrew bleed valve. Is there more to it. I like using my kane for let by and tightness but if the ecv is stiff it can be fiddly getting the pressures right. The afor mentioned are meant to make it easier but I am reuctant to spend £24 on a bit of hose and a valve if thats al it is but I have never seen one close up.