The angeled top panel and top panel were fixed in permanently, while the marquee bottom is just clamped in place just to see how it looks and fits.
Everything is being written here in lightning speed, which is the absolute opposite of the actual process of measuring, guiding, clamping, sawing, unclamping, screaming in horror at a sawing mistake, re-measure, reclamp, re-scream, etc.
Had several nights sleep lost over the marquee installation. decided to go with that happ thing. hope it's going to prove right