I am about to place a large frame order (40-50) for Nielson aluminum frames. I usually buy from Light Impressions but would like to support APUG sponsors as much as possible. Your prices are better than Light Impressions so I am pleased with that. However, once I tried to save money and purchased from an online store but I was disappointed. The joints on the frames were cut poorly and did not always align properly. Also, the frames were coated with fine aluminum burrs which were a real nuisance to remove. So, I am asking if your Nielson aluminum frames are cut precisely at 45 degrees and whether they come burr-free and clean? Thanks.