I get periodic deviations in my mash PH from EZ water (most likely my error), so taking a reading gives me an opportunity to make simple adjustments. Milwaukee Instruments is the model I use and like:
http://www.amazon.com/Milwaukee-Instrum ... lwaukee+ph
Just make sure you get 4.0 and 7.0 calibration points if you get a meter. I despise PH strips, they don’t read with precision in my experience, but opinions definitely vary.
I was given a Greenlee 13/16 inch punch for x-mas. Step bits work okay, but this punch is excellent. For all the holes I’ve made for 1/2 nipples (giggity), I wish I would have got one sooner. It made ridiculously quick work on a keg; the edges are perfect without effort.
I’ve had excellent experiences with NorCal lately. Their false bottoms aren’t the cheapest out there, but the craftsmanship is most excellent, you’d never be wanting another. Lot’s of other cool stuff there too, and Jay and his staff are excellent to work with.