The difference between a desktop FDM printer and the Stratasys Fortus 450mc or the INTAMSYS Funmat Pro 610 HT is not primarily price. It is process control. Industrial FDM equipment operates with a climate-controlled build chamber that maintains the thermal environment required for high-performance polymers to crystallize correctly as they are deposited. Material is loaded from sealed, humidity-controlled cartridges with lot traceability. Build parameters are controlled to manufacturer specifications, not adjusted by trial and error. The result is a part whose mechanical properties correspond to the published material data sheet — which is the only basis on which you can make an informed decision about whether the part is appropriate for your application.
Desktop equipment cannot reliably reproduce these conditions. The parts it produces may look correct. They may even pass basic functional tests. But the layer adhesion, the crystallinity, and the dimensional stability under thermal load will not match what the material is capable of when processed correctly. For a part that goes into an aircraft, that gap matters.
APS does not operate desktop printers for production work. The equipment list on this page is not marketing. It is the reason you should use us over a makerspace, a desktop print farm, or a general-purpose service bureau that runs high-performance materials on equipment not designed for them.