I had a 2foot by 2foot sheet of stainless steel I laid down on my wood garage floor to put the bike on the center stand for an oil change.While walking to the tool box I bumped into the bike and it moved about 6 inches.To my surprise I can rotate the bike 360 degrees with just one hand on the stainless plate.I took another piece and put under my 84 now I have 2 turntables.Works great.PS....I tried a sheet of aluminum but I guess it is too soft and did not work for me.