Looks as if I'm going to have to scratch-build a version for the 69-mm EDF unit that I have lying around.

Is there a good 3-view that shows the bulkheads or similar cross-sections, especially the tail-end view?

I've got a set of the "Peregrine" version 3-view and that gives me my starting point, but not enough details exist so that I can design a proper set of plans.

Only alternative would be to get the Tacker plans and work his bulheads into my design.

BTW, the WREN-powered version does look good, but I burn electrons rather than kero.....