When you build parts for sale you have to take a chance and trust people to help test them. I build traction bar kits. I put a set on my truck to test but felt I needed independent people to also test a kit to make sure they bolted up properly and didn't bend or break. I gave away two sets for free to people I didn't know. Just got PM's from a couple guys asking about the strength and ease of installation. I offered to send out a set if they would give me some feedback. It cost me allot of money up front but not only did these guys test for me but they spread the word and allot of sales were generated from this. Not only is it necessary but independent testing can be very beneficial to the seller.