I just bought a new Blichmann HopBlocker, I use a keggle and set it up with a 1/4 copper line, and placed it in the center of keg it's the only spot that it will rest flat on the bottom, Just got done brewing a IPA with about 8oz of hops for a 10 gallon batch.
It was completely unusable, the blocker didn't block anything but the flow from the outlet and got caught on my immersion chiller, I had to remove it, to get any flow at all. What a mess.I don't dought that this works really well in the blichmann kettle with the flat bottom. But it's never going to work in a keggle. Just to let you know this is my 100 batch, I have designed 3 other hop separators for my keggles this is the 4th one I have tried. It's very expensive solution,but was willing to do anything to try to reduce the trub going into the fermentor. But nothing has worked to my satisfaction.
I just meet John blichman and I wanted this to work so badly, But I have to say this and the beer gun just worthless.