Dean,
You're most welcome my friend. I built a number of Sierra's 1/72 scale Bombers before pretty much giving up on the scale. All of them were outstanding kits and very much worth the effort. Rareplanes kit of the Gotha G.IV/ V is another excellent kit, sadly long out of production but they seem to show up on E-bay regularly . She'd be an excellent addition to any WW I Bomber collection too. I'll be looking forward to seeing a Vacuform project from you in the future my friend.
Highest Regards,
Gregory Jouette