Yesterday I was helping another archer set up their new olympic recurve bow. To establish the limb tiller I set it to '0' with limbs the correct way round. We then reversed the limbs and checked the tiller again. It read 'Positive 6mm'. So does that mean that the top limb is stronger than the bottom limb? Should the tiller difference be set on the top limb not the bottom one? Or should they shoot the bow with the tiller corrected to '+ 3 mm' with the limbs reversed? When I did this test on my bow the was '0' when the limbs were reversed.