Hello, really wondering how to hook the hold feature on the LFO. I managed to protoboard the LFO to your schematics,the pitch modulation works brilliantly. I think confusion is coming from there being two points for the hold and tone features and only one for the pitch.
 Also,there is a control pin on the 555 timer, could this be used for CV sync? That dam bug!
Thank you, all the best