or: why painstaking pinning proves perfection (im)possible
Sewing velvet is something else...
A small test showed pinning was not enough. Nor was basting.
So, not to lose too much time (and fabric) testing methods, now I first pin the edges, then pin a bit inside, then baste near the edge, and baste again a bit inside the seamline. It works, sort of.
(Second basting not yet done)
And I'm glad I'm only making two of these!
However, I think they are going to look stunning - especially when the golden snakes are in place!