No offence but this profile is a crap. Its not a heavy duty profile, just look at the design of it, with these holes and how the ribs are situated inside of it.

Of course depends how strong your machine you want to be.

Simply put: the ideal gantry alu profile is not born yet.

IMHO there are nice alu profile designs in the forums and the good ones have steel reinforcing plate on the gantry, one way or another.

The best so far alu implementation in a gantry i have seen is what Dean/JAZZCNC/ builds, so if you are for tidiness look there. And is not a profile.

This is the american way-bolting together profiles and having fear from some soldering. Shiny expensive useless machines. I was also a bit infected, thanks Dean that he cured me from the rack and pinion desire.

steel profile+square supported rails+ball screws=good machine worth spending some money for the build.