I'm getting close to pulling the trigger on a Cade S2 900 and am a little concerned about the long-term impressions the feet may leave in my hardwood flooring. Each of the 6 feet will be supporting ~190lbs, and I'm not sure how hard this particular flooring is. To play it safe, I may want to put some material underneath, but am not sure what's best (and wouldn't look bad!). What do you think?