Help adding a boost to a boss pedal

[tlaubs]

I recently rehouse a boss OC-2 because I needed top mounted jacks to fit on my board.  I also wanted to add a boost to it because when I solo the -1 octave (how I use it 90% of the time( there is a volume drop.  So I added a MXR micro amp clone after the effect and it works great.

However, the boost is in my chain even if the octave is off.  I know this is because I kept the original buffered bypass and used a SPST momentary switch for the on and off.  Does anyone know how I can find out where in the circuit to patch in the boost so that it is only on when the pedal is on?

Thanks

[ubersam]

Given this schematic of the OC-2: http://www.hobby-hour.com/electronics/s/schematics/boss-oc2-octaver-schematic.gif

I would take out C6 and insert the booster there.

[tlaubs]

Thanks,  which side would be the send and which the return?

[ubersam]

Return will be the point connected to R12/Q3 junction, so Send will be the other point. Like this: https://www.dropbox.com/s/uga2o495t2e3lgu/oc2%20pcb.jpg?dl=0