I find some aspects of corsetry tiresome - putting in eyelets for instance. I also don't like creating boning channels from strips of fabric or bias binding and lining them up so they are symmetrical with the other side - it's a right faff! I now create my mid-panel boning channels so they are intrinsic to the panels themselves. Each channel needs 2cm of extra fabric. They are so neat when executed properly - and if you mark the parallel lines accurately and in line with the grainline, they are always going to be exactly symmetrical with the other side. They look like lapped seams so if ironed to the correct side they will look like the seams and be consistent across the corset. Try it!