On a similar note of seriousness, and I'm not being flippant, just select a couple of coins and send them off, it'll be peanuts in the grand scheme of things! The experience will answer most of your questions...it will solve experience, your own perception of quality, AND the CGS criteria! It's a small price to pay! The upside is you can then bark (maybe) on the forum, as slabbing is highly emotive, as you have probably guessed!