To eliminate possible power cord chaffing on the frame across the bottom of the bay, I made a long roller from a 24" long piece of 1/2" EMT conduit. I made stubs that fit in each end of the conduit ( lathe required ). Then cut 2 ea. 1" long 3/4" angle iron, drilled a 3/8" hole in the angle for the stubs to slide into. Then bolted to the bottom of the frame. One person can now pull out the cord with out dragging across the sharp edge of the frame.