Yes, mostly in house except for specialty materials, high labor components, etc, similar to the workflow at many small hardware firms with machine shops. We jus

Yes, mostly in house except for specialty materials, high labor components, etc, similar to the workflow at many small hardware firms with machine shops. We just had more combustion involved than your average hardware company. The compact dimension of the demonstrator engines make that kind of agile development possible--similar to the idea behind Boom's scale demonstrator.