What's the best sight tool out there? I'm eyeballin' the B&J P500 Pro but it runs $275. Is there much difference between that one and the $130 standard version? Most of my guns have dovetail sights so my tool needs to be geared towards that. Is there a better place to buy them than Brownells and Midway? Both companies are out of stock 90% of the time, another reason I'm being forced towards the $275 Pro model. What are the odds I mar one of my pretty guns with this?