L Style Gantry on a 6040 sized machine?

[Sterob]

If it helps, this is what I used on a 1m wide gantry, and is commonly recommend here because of the spacing matching up well with BK12s.

https://www.aluminium-profile.co.uk/...file-kjn990300

Some of the bits I think are important are the heavy duty nature and the associated increases in moment of inertia which can be used to calculate deformation under load.

I've combined two of these into an L, so my gantry occupies 135 x 90.

Thanks Andy...It all helps.
My Gantry will only be about 680mm wide, which is not that far off what yours is , I guess.
Are both parts of the L usually of the same dimensions to get the required rigidity?