Yet another temperature tower

Aug 26 2020: Added a pic of carbon fiber polycarbonate that was vacuum dried for 24 hours at 10Pa (pascal). The bottom bridge is printed at 260C reducing in 5C steps. Printed on a heated bed at 150C. Tested the tower by squeezing with needle nose pliers to destruction. The print is brittle at cooler temperatures but still looks fine. At 260-250C the thin walled print is tough.

Hollow spline surface on one side and half a thread inside and outside on the other. 45 and 30 degree overhangs connect to the bridge. Bridge front bottom edge is square, bridge back bottom edge is a 45 degree chamfer.
The top of each bridge is a multiple of 5 mm from the build surface. I reduce the temperature 5C at the bridge top.
PETG filament in pic printed on a heated PEI sheet at 85C tower starts at 255C. For me the spline having a smooth glossy surface is the most important criterion indicating layer strength (you can see the min and max temperatures in the surface gloss and you have some temperature