French Toast rehousing... again

[lowell]

Hey guys,
       I just rehoused an FT w/ true bypass, LED, and a stomp octave switch.  The pedal is switching well and bypass and effect signals work.  Here's the issue though.  When the effect is on there is a low frequency oscillation and it's loud.  I still get sound through the pedal, distortion etc...

Regarding the post by Processaurus in this older thread http://www.diystompboxes.com/smfforum/index.php?topic=73428.msg595725#msg595725 about permanently turning on the original switching.  The 4053 chip seems to have pins 11,12,13 all hard wired via traces.  I disconnected all 3 of those pins by cutting the trace and connected them to pin 16 (+9v).  I'm thinking this is what's causing the issue.  Please advise, maybe I should keep pins 12,13 connected to the other IC?  Or disconnect them altogether?