I haven't found a resin that didn't have bubbles yet; however, you can reduce bubbles significantly by pouring in an area with a constant temp. I pour in our guest room (man that one really ticks the lady friend off!). I've noticed that right around 60F has worked best for me. Don't get me wrong, I do get bubbles and if your adding mb's then there is no way around it, but making sure you do everything exactly the same every time will help. The price is right for aero, and it seems just as good if not better than anything else I've tried (but haven't tried alumilite).
I weigh and record my swimbaits 4 times for each section. I'll weigh the poured section, then the trimmed and drilled pieces, then weigh after paint and clear, then a final weigh after weighting (for desired rate of fall). Even by doing everything the exact same (to the second when stirring the resins!) I can still have a gram difference FOR EACH SECTION between 2 different baits. Hard to believe that a piece that weighs only 3 grams (on average) can come out 2.1 grams for the next pour a half hour later (does anyone know if alumilite is the same way?). However, each section is consistent with each piece within that pour. For example, if you pour a 4 piece bait, each piece will have the same proportions by weight in comparison to another bait. So if you do get a section that seams a little light, all the other pieces from that same pour will be just a little light as well. What does all this mean? Well if you keep a record you can look up a previous lure with a similar weight and add the correct amount of weight to make it do what you want. Sorry, kind of getting obsessed with this... just take my word for it a record everything. It will save you time and money.