After much delay from what I feel was poor service from my local norfab distributer I have finally received my ductwork. I submitted a drawing of my self designed system to my local distributer and they put the order together and placed the order. The shipment arrived in 1 huge box strapped to a pallet about 2 weeks later. The snaplock clamp together system is very nice and makes making changes a snap. I installed most of the system myself but having a helper at least for the overhead runs was a must for me. I didn't bother including blast gates with my order as the norfab gates are 4 or 5 times the price as others. This ducting is pricy but I think its a good investment in my shop and should last a lifetime. Total cost of my ducting system was about $4K. So far I'm very pleased the system and cant wait to start my next project to put the system to a true test.