Hi, can anyone more experienced give me an opinion on what should I choose as a gantry for a DIY build?
Coming from workbee cnc, I did a lot of upgrades making it a pretty solid machine.

But now I am building something slightly more rigid. 40 series extrusions instead of Vslot ones, full aluminum bed, 20 mm thick plates, etc.

Currently I have a 80x60x3 steel box section as the X gantry. How does it compare to a 80x160 or 90x180 mm aluminum extrusion?
The Fusion360 simulations say they should perform about the same, but I am not sure if I can trust my simulation setup...

The question is should I use the steel gantry on the new build (perhaps packed with non shrinking grout) or change it to the big aluminum extrusion? Or perhaps go with bigger steel like 80x100?
The gantry span is not big, just 1000 mm.

If any more info is required I am happy to provide it.

Thank you.

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