Prusa has some good numbers for Prusament filaments run through their machines. I don't use their filaments and I am personally horrified at the thought of maxing out at 8mm3/s.

In preparation for the frame changes I now plan to make I want to further brace the vertical beams so they can be more positively located without any upper support. For this effort I have made these triangles..



They are made from PETG and are 120mm X 120mm. These will compliment the inside corners I am already using and each one will be held in place with 8 m4x20 screws and t-slot nuts..



I need 4 of these for the front and rear and have 120mm X 80mm for the 2 sides as the smooth rails for Z limit how far out my corners can go. Here is one all bolted down and ready to go..