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I got the little triangles that were welded in between the frame and the slider legs for extra reinforcement, too.



Like John says, the gussets go a long way for support. Check here http://www.ballisticfabrication.com/Cage-gusset-with-holes_p_1185.html
You can find them cheaper if you do a search on line, just be aware of the sizes. Both the size of the gusset and how much space you have underneath the slider and amount of frame to weld to

1990 Montero LWB 3.0
Lodi, Ca. USA