Electro Harmonix Tri Parallel Mixer

despite a very nice product idea...
A shame because construction seems very good and foot switches relay type very smooth also... The 1 knob EQ is a joint bass/treble baxandall with crossing @600Hz and +/-10dB on each band. There is no center detent on volume pots, which can make it easy to loose oneself levelwise given the number of pots there is... The phase switch is on the send output, which can be annoying depending on the application where we would prefer it on the return input.
What I really find annoying is the input buffer and master bypass buffer that are not neutral at all with non negligible losses towards bass spectrum... Especially that the "Return" buffers are perfectly good in comparison...
I am fed up trying all these products never consistent or to specs and sending them back, I am decided now I will just do my own...