this is for any of you veteran techs out there... I am going to purchase my first set of snappy combination ratcheting wrenches and i have some questions. Should i get the 15 degree off set or the zero degree offsets? and should i get the open end with the flank drine plus or the regular smooth open end? My current sets of combination wrenches don't have the flank drive on the open end and was woundering if i should get the ratcheting combos withthe flank drive open end? Any suggestions would be greatly appreciated. Thanks.