Do not pull and stretch around corners and do not allow the rug to hang off the table as you add you "rounds". In fact, I started slightly pushing my unattached strip roll (don't know what else to call it)into the curve, causing more give in the curve. The. I pressed everso often with best press. I found that pushing and easing, while holding the rug side, into the curves, really helped with the aggravating cupping. Best wishes.