Only do this step if you purchased the Supreme mod kit

Change out the components on the main PCB indicated in the pic

Put the screws back in the main PCB and flip the amp over. There is a cover over the power filter caps that will need to be replaced

Replace the caps as indicated in the pic. C31, R65, and R66 are removed and a clipped off lead from one of the components is jumpered where R65 was.

Put the filter cap cover back in place