I've got that ThermoPro TP03. Works first as a probe, second as a temp check.
I switched to spares, too, a long time ago. I can buy boneless pork loins for $1.68 / lb, + or - twenty to thirty cents. I can buy untrimmed spares for $0.98 to $1.88 / lb pretty much year round. I saw $2.28 / lb a few times this past Spring, which is usually the price for SLCs. I passed on by until their "sell by" date, when they dropped a buck a pound.
BBs are never less than $2.98 / lb in my area, and usually a dollar to three dollars more per pound. It's pork with bones. Yeah, yeah, supply/demand, blah blah. My wife was a diehard BB lover until I perfected my spares. Now she knows, when I say "ribs" I'm referring to spares.
I've been debating pulling a couple butts out of the freezer for this weekend. I think I'll do spare ribs instead!