text: who are the best builders of custom, specialized parts and assemblies? i am looking for quality people in houston, tx to build a centrifugal fan using airfoil blades which moves air out radially (in all directions) on an electric engine with minimal weight (of the machine assembly). i am also interested in instructions on how to construct a quality product myself without expensive tools (even with toothpicks and straws, tape and glue, if it accomplishes the mission). well thats really several questions.  any fab shop with laser or plasma cutting equipment and some machine shop capablility can fabricate a centrifugal blower wheel.  we've build several using stainless steel.  but not with air foil blades, which are only good for clean air, if any dust or dirt is in the air stream i'd recommend flat rather than air foil blades.  as for the second part, theres never been a time when it was easier to produce a high quality product without a lot of expensive tooling.  advances in computer aided design and cnc machining have made it possible to produce precision parts in small quantities.    the company where i work produces one of kind special machines and what components we can't buy off the shelf we can fabricate for in most cases ourselves.  but i could farm out all of the welding and machine work and only bolt the assemblies together will nothing but hand tools.  one of our competitors in florida builds food processing equipment.  he farms out all of the components which require machining or welding.  he assembles his equipment with a wrench.  to do that would require accurate component drawings and proper tolerances.  which if you have a good cad system shouldn't be a problem.