Hi Michael

Thank you for the detailed tips and fix .

Studying your detailed commentary and there are now some more areas of MOI that I will be looking into.

Thanks also for the new STL strategies to try for Fan Duct version 4 .

Here is how version 3 the first successful prototype turned out . Bit rough ( your fix's and methods not used on this one) , but I expect the next one printed will have a better smoother finish using your recommendations. Should also benefit from the better fan cooling cooling like the finish on the new orange fan finger guards just printed