I have to report that cutting the Mask after forming but before gluing makes the gluing stage really REALLY tricky!
(i only own one clamp and a mess of clothes pins.)
the first bucket was much easier in that regard.
there i only added glue to the areas of the mask, then married the inside and mask together, cutting the mask out after the glue had set.
some glue leaked into areas to be cut away but if you are sparing with the glue there shouldn't be any big disasters (like the back not coming off after cutting).
on a separate note, i discovered the hard way that one should cut cardboard on the side to be presented. after bending and cutting (in this order!)
the first keyhole slot (pics forthcoming), i had to cut out the keyholes from what turned out to be the backside.
it would have been MUCH easier to simply cut it out from the inside of the bend, not to mention a better looking end product.
110% vent:
[ATTACH=full]118546[/ATTACH]
[ATTACH=full]118547[/ATTACH]
[ATTACH=full]118548[/ATTACH]