Isn't it annoying when you realize that you didn't think the process through *quite* thoroughly enough, and that now you have sewn *this* bit to *that* bit, *these* bits are going to be impossible...
It's quicker, easier, and therefore cheaper, to recut the bits than unpick. Unpicking serged and zigzagged seams in scarlet stretch nylon/Lycra leotard fabric is not to be contermplated by someone who wishes to remain sane*. I did buy more fabric than needed for the finished item, as a toile for stretch nylon/Lycra needs also to be made in stretch nylon/Lycra, and this stuff is about as cheap as it comes.
Pix later, once I've re-cut, sewn it properly, and stopped being slightly miffed.
*For certain values of sane. In this house 'sane' skewed at best.