Looks great, man. Glad to see a fellow Canuck doing a curved screen. I built one myself and it's the bees knees around here. I initially used spandex but I ended up switching it out and went with Seymour Centerstage XD material and it's been fantastic. I'm looking forward to seeing how it all turns out for you. Best of luck.
Video: Optoma HD3300, Panamorph UH480, Darbee Darblet, Samsung BD D6700 Blu Ray player, DIY Seymour Centerstage XD 138" Curved Screen
LCR - Tannoy DC12i, Sides - Tannoy IW63, Rears - Tannoy Saturn DC6ti Bookshelf, Ceilings - Tannoy CMS 603DC (TF), Tannoy CMS 601DC (TR), 3 Micro Marty/1 Full Marty DIY subs
Amplification: Emotiva XPA-3, Emotiva XPA-2, Outlaw Audio 7700, 2x Inuke 6000DSP
Receiver: Anthem MRX 720