First up, my thanks to Precise Parts, who modified their adapter database to allow the creation of a STX coupling just 4mm thick.
The reason: this was the required spacing for Alluna's AFFR reducer/corrector....which had to be within 1mm to be on spec.
The result: a 16" F6 with sublime correction to the edge of a 16803 CCD.
proof of the pudding here
I have to say I am very pleased with the results....really tight stars across the entire chip.
It's really nice when things work as advertised
