Do this T Slots is strong enough on my 2700x1500mm DIY cnc woodworking router

I was trying to build a cnc woodworking router using chinese profile rail (butt joint 1500mm+1200mm) 20mm on the longer axis (2700mm), i was wonder whether these t slot are strong enough to mount the profile rail on the longer axis?

Well 8020 does not ship to india. couldn't find any t slot online store in india except the one i attached here.


http://www.cnczone.com/forums/attach...d=367090&stc=1

can someone help me please regarding the rigidity of this extrusion