Re: adjustable square for SHS / box sections

Thanks everyone for all tips.

One is, given saw cutting long lengths of "box" is accurate transversely
but less so "vertically" due to spring in section and distance outrigger
is from saw, position "flash" at "side" as sawn so have "square" end
as do "measure along" direction AND drill can go through both sides of
"box" on drill-press, not risking hitting "flash" on opposite side.

I will look if adjustable square with a wide "foot" is available.  Would
need a "foot" about 2inches / 50mm wide for when doing big Rectangular
Hollow Sections with big corner radii.

Bigger overall point - thanks a lot everyone.

Regards,
Rich S