Many owners stored, abandoned, or sold their incomplete kits, but a few hundred diehard builders finished them with a variety of engines, with installations designed by third parties and former Bede Aircraft dealers. Having to hunt for an engine was only one problem. The time to build the aircraft was much longer than quoted; original estimates from the company put it at 600 to 800 hours but users estimated it to be as much as 3,500 hours. Some of this was due to the need to fit their selected engine into an airframe designed for the Hirth, which was no longer available. Additionally, the construction techniques had improved somewhat since early Bede designs, but fastening the panels still required drilling, deburring, dimpling, drilling again and deburring again for each rivet. With the original mixed-construction design this would not have been as much of a task, but with the all-metal version this was extremely time-consuming. While Bede claimed the aircraft could be put together by anyone in a garage, builders generally agree that doing so without proper construction techniques could result in a potentially dangerous aircraft. One way to overcome that issue is to use a set of properly laid-out jigs to align and drill the pilot holes for the airframe, wings and other components. For all of these reasons, it was some time before completed BD-5s started to appear.