Mavimao said:

A "proper" anamorphic projection will pincushion. That's why you have curved screens in theatres.

I know that, but mine isn't pincusioning for the same reason, since it isn't being projected. The WorkPrinter I'm using has a custom enlarged gate and that is what is contributing to the pincusioning, because the optics are slightly off as you reach to the extreme edges - ordinarily the gate would mask it. I guess I could claim to be simulating the anamorphic pincusioning effect. :)