Hi,
I know it was a few years ago when you spoke about this, but I found it really helpful (to a point). I have a HX Effects and a H&K GM36 and I followed your instructions above. It worked in that if I select Preset 14C on the HX it changes the amp to Preset 14C. The problem is that I also use an iPad with the amp which can be used to change all of the parameters on the amp. However when I connect the HX as above the iPad no longer controls the amp settings like volume effects etc. I can use it to change presets on the amp and it changes the presets on the HX. Am I asking too much of it or am I doing something wrong. Thank you