I just got my Trend Pro and it works great. However I can tell you from having been in the machine tool industry that a large portion of the cost of a product is product liability insurance. We use to sell a little air over hydrolic press and about half of the $2500 cost was product liability insurance as there had been very heavy claims with that type of machine. 3M has tons of government and commercial contracts they have to have that insurance and ratings to meet contract requirements etc. I bet Trend does not have those types of contracts and caters to the consumer market more. Not saying the 3m is not better because it is probably of better construction but for most of us hobbies and semi-pro turners worried about particulate protection It is a leap forward compared to what most of us use which is nothing.

Alan