Here's something I found quite interesting, it's a radio interview and walkaround with the Production Manager of TVAL (The Vintage Aviator Ltd), a NZ company which is arguably the most prolific restorer and constructor of WW1 aircraft. Scroll to the bottom of the page of the link below and you can listen to the interview... either the 25min version that was broadcast or the 1hr 7min extended version which I recommend.

http://www.radionz.co.nz/national/programmes/ourchangingworld/audio/20162295/recreating-vintage-airplanes

HB

interesting, thx for sharing