I’m considering aluminum angle for the bottoms of drawer boxes that would slide on waxed hardwood channels. The boxes are made of plywood and wouldn’t hold up to the wear of direct contact. There is not space at the bottom to build up with hardwood. Side full extensions would be great, but would cost $1000 for this size project- and I’m selling the house. So…I want effective and cheap. On the left and right bottoms of the boxes I would install aluminum angle with the screws countersunk. They would rest on wood runners, old school style. I’m just curious if aluminum would glide on hardwood under a load of 20-30 pounds. Anybody have experience or a word of advice?