We are trying Precision with a 10-13 1 NT nv 1st and 2nd seat and otherwise 11-13, all other seats and vulnerabilities. We open all 5332 and some 5422 hands 1NT. With good "escapes" we are getting some good results and is not a scary as we thought it might be. I know that conventional wisdom would argue for a higher range vulnerable and certainly in 4th seat. Still, we have not gone for any big numbers, and are wondering if anyone else has any experience with this structure. Our 14-16 balanced and semi-balanced hands are opened 1d with a no trump rebid. It may sound non-sensical but it sure feels good not to have to open balanced 11-13 hands 1 diamond.