air filter off again, tank was half full, other best runs had 3/8 tank switched down to 75mm pulley, thinking I have belt spin on launch or belt may not be gripping orrrr the boost was that much less on the 75 from the 72mm griptec 400ft DA I let out before the end so numbers would have been better

air filter off again, tank was half full, other best runs had 3/8 tank switched down to 75mm pulley, thinking I have belt spin on launch or belt may not be gripping orrrr the boost was that much less on the 75 from the 72mm griptec