Due to the generosity of my wife and BIL, I've got bucks to burn at the LHBS (well, gift certificates, anyway). I'm totally stocked up on brewing supplies, so I think I'm gonna pick up a pH meter. The one he sells is the Milwaukee pH51. Anybody have any experience with this brand? And any tips you can give me for using it? I assume I'll want to pull a sample and cool it down as opposed to just sticking the meter in the mash?