Hi Michael,
My C11 is mounted on my Losmandy G11. A local amateur has offered me his side-by-side bar similar to this model
ADM D Series Side By Side Bar With Dual Load Saddles – Rother Valley Optics Ltd
to add my 4-inch apo refractor. I haven’t taken the plunge.
The separation between the OTAs provided by this specific bar is probably too small for your ‘scopes.
Cheers,
Alex.