Common imaging train

WO Flat7A + ASI2600MM Pro + EFW 7×36 + OAG-L

The Flat7A is the 0.8× reducer-flattener for the larger GT/FLT tubes; 55 mm behind its M48×0.75 thread. The mono train ZWO designed the pieces around: the camera keeps its tilt plate, the 7×36 wheel bolts to it, and the OAG-L bolts to the wheel with its M48 plate facing the telescope. The unmounted 36 mm filter glass still shifts focus slightly, and the 36 mm bore is the thing to watch on anything larger than APS-C. Same 55 mm answer as the Flat6AIII; the difference is which tubes it is matched to.