yea... you cant do that. You have to be VERY careful, and have an extremely steady hand. and in a dusty environment, you have to be VERY fast too! Unless you make yourself a "clean box" which is nothing more than a tupperware container with glued in-place gloves to operate on it, and a couple of 12v fans that are silicone sealed. One intake and one exaust, Both having a high quality HEPA on the ends so no dusty air can leak back in while your operating on it, and so you can pull all the dust out of the box before starting.