L Style Gantry on a 6040 sized machine?

[Sterob]

Have sent emails to UK and China enquiring about 45 series extrusion...no good leads yet.
In the mean time, it seems that some supplies do not offer an intemediate size, ie 90 x 135mm.
This means I have to use a different sizes for the Gantry.
I was wondering if there is a difference in the stiffness of a Gantry between these 2 options?
Steve


Option B is my preference, if joining on the back is acceptable to do.

[JAZZCNC]

What size machine you building because 90 x180 profile arranged in L shape will make for a BIG gantry. To give an example I've just built a 10 x 5 machine with 2mtr wide gantry and it's only using 80 x 160.
Also, The point of the L shaped gantry is to have the bottom profile laid flat which is the stiffest direction for the cutting forces.