Very good. Are you dewaxing? I've been doing a 48 hour dewax on dry ice and everything is so consistent. If something doesn't turn out beautiful and stable, you'll know that the trim was garbage from the start. I like to blast into a large 8 cup measuring glass (Pyrex, Anchor has seams that can come apart at those temps), and I stick that in an ice chest with 5 to 10 pounds of dry ice on either side, and pop a lid on my pyrex so it doesn't get water in it. It's best to do this when it's a pool of butane, if you let it evaporate and thicken first, you'll have a very small amount of super pure pull-snap, and a huge amount of extra fatty shatter.
Once it's been winterizing for 48 hours you can pour it through a buchner funnel, if you don't have a buchner funnel, a round fry basket (same size as a coffee filter), a coffee filter, and another 8 cup measuring glass can be used to filter. Pour everything through, even the fatty looking stuff, because you want at least a little to get through that filter and add a little flavor back and give you a brittle shatter instead of a pull-snap (although I much prefer pull snap, inexperienced dispensaries love it and donate a lot more for it). If you cannot filter, just pour everything clean looking into another pyrex cup (in warm tap water, never have a hot plate near butane) and you'll see all the fatty boogers sitting at the bottom, and if you just try your best to keep that in the dish you're pouring from you'll have beautiful results but more waste product left over. You can pour up the waste product and scrape the fat stuck to the dish and use that for cooking, that's what I do with all my waste product from when I didn't have filter papers for my buchner.
After pouring into the other glass you always evaporate with hot tap water, replace the water as it gets cold. Once it has evaporated into a thick syrup and is no longer bubbling in the warm water bath, it's time to dry off the outside of your measuring cup and pour it onto your parchment. By pouring, and not scraping, you have removed any threat of buddering from agitation. You'll have about an eighth of product stuck to your measuring cup by the end of it all, I would scrape that immediately before it firms up and put that on a separate piece of parchment for your own personal smoke. Even if that budders up, you're large slab will be perfect. I don't mind smoking budder, but it's not worth as much to the clubs.
Anyways, the dark color was lent by that November trim. As product gets older the trichomes get darker, and that shows up in your extract. I rarely ever mix old and new product unless I know it's a plant that stands up to age real well, like early crop Blue Dream.
And there you go, I didn't leave many tips or tricks out, so with a little fine tuning you'll be ready to compete head to head with The San Andreas Shatter Company at the 2017 Chalice Cup