the only guy i know who can play both left and right hand is a pro i know... of course his right handed play is much better... but i think unless you have too much time on your hand (or you are a pro who spend half your time in the driving ranges) , it's tough to practise both to a certain level of capability ...

i can putt left handed though...for short putts , (1 putter length and less) , i 'm deadly with my left hand putt ..