Hi Crawdaddy 57,I have a new C-9 pedal too (and run it in stereo along with my B-9 pedal through separate amps) and I’m slowly adapting to its learning curve.I have found that with the Mellotron setting that you have to turn the “Organ” volume up higher than the volume that you’d use on most other settings and turn the “Dry” signal off completely, in order to achieve a suitable effect volume.Have you tried tweaking the Mod and Click controls?By gradually tweaking these controls and experimenting with different settings you can get a pretty nice Mellotron flute tone.I have used it to play the flute part for “Nights in White Satin” and “For my Lady” by The Moody Blues with my guitar and the result is beautiful.You can also affect the effect by using different pickups some settings sound better by using the neck pickup while others sound better with the bridge pickup etc.Good luck with it.BTW:Sending prayers for your dad in hopes that he has a speedy and full recovery-Cheers.

P.S. I have several vintage E-H pedals too,with the oldest being a ’69/’70 Big Muff Pi (my first fuzz/distortion pedal),I also have one of the first Frequency Analyzers and an early Bad Stone phase shifter plus some others.