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Advanced tips? Answered

I use a uniform transparent box, held together with corner clips, instead of spending so much time making each one separately. this makes the time to cast almost equal, I can set them on racks closer together, with photos of the finished product on the front. it's much more efficient. although, your training is imperative to understand how I got to where I did. And to eliminate the worst bubbles, place the board on an ultrasonic vibration device for a few minutes. Thank you very much! :-)