Changing fixture modes / Workflow for adjusting Color Pallets

We have a full rig of approximately. 30x S4 Daylight HDs. When they were first installed, they were setup in HSIC Mode as per the current designer's request. Said designer is not working here anymore and i really want to get these fixtures in Direct mode for easier programming.

However, changing modes on all the S4s breaks most of our current color palettes. Since we are a repertory theatre with about 8 active shows its gonna be a pita to adjust colors / redo CPs. I was wondering if anyone here has experience with drastic changes in Patch and can chime in with some workflow advice on how to integrate the new modes with minimal effort.

Here's my current plan:

Im gonna grab two unused S4s and set them up at FOH. One in HSIC mode and one in direct mode. Then i can recall the colors to the HSIC fixture and then store a new CP with the Direct fixture (e.g. CP x.1). Then I can replace CP X with CP X.1 in Blind for the whole show. This would be my naive approach. 

Please let me know if you can think of a better workflow to mass update Color Palettes when changing fixture modes.

Thanks.

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