Thanks for that link Scoop. Very helpful. My Ombra compressor seems to work fine but has become very noisy with a vibrating sound. I use the sprint cups. I cannot remember why but I did not like the LC Plus as much. Have you compared the cups and what was your experience? I find that the two compressors from Pari are either too strong/fast (ProNeb Max) or too weak (Vios) and the Ombra seems just right or between the two.