Mine is also laced front and back. I have a "split" at the back where the original has one - I think its about an inch or two over the waist. I felt that lacing ALL the way down through the tabs would make it a bit too "victorian" in feel (not aesthetics as this is very unlike a victorian corset!). Mine was/is very comfy (apart from it stretching enough to be pretty much edge to edge front AND back after just 4 days wear!)

Hopefully you will be ok with the floss. Unfortunately I don't seem to have shown a close up of the eyelets after I had sewn them. I've only got a close up of them when they were whipped on ready for sewing.

By the way - I didn't use floss for mine, but I used normal sewing thread. This is because I used a silk floss on my old corset eyelets and the silk eventually wore away.