Hello Jackson,
Just to help you understand the output value from the Show Control: All that is routed to the output is merged according the Highest Takes Precedence (HTP). This means that, if the Recordings and and Show Control is in use, for every channel the highest value will be used. Thus, if you output 255 on a channel via the Show Control, this will be the value used. Outputting 0 will probably have very little influence, either the channel in the recording was already 0, or some larger value will be written to this channel and used since it has a higher value.
I would really like to tell you that this is possible, but I don't see any other appealing alternative as outputting these channels from the Show Control. Unless the values are 'right' when set to 100% (255) it is going to be tough. If redoing the recording truly is not an option you could try to use a second CueCore to filter out the useful channels by mapping these channels via actions. Before starting this operation, please do take the maximium amount of action and task into consideration.
I hope this gives some inspiration for solving the problem.
Best regards,
Jurrien