It is nothing to do with the function of the camera, or the quality of the optical performance, but only personal pursuit from good to excellence.
Prototype of the Byron I made, most of the images in my blog taken from it, no one ever criticized about this, a significant sign beneath the covering of the film chamber door.
Original there was a big extruding switch for instant film process, for simplify the outlook, this useless switch was mill flat, and a thin layer of steel plate was pasted to block the hole left, thus the plate leaves its trace when covered by leatherette.
Yes, it is nothing to do with the functions, and no one ever said anything about it, but I myself feel very annoyed by this, like a big pimple on a beautiful girl's face.
Determined to take it off, what my plan is to implant the thin steel plate, leave no trace of it on cover.
With thin layer steel plate and AB glue for metal, the hole is covered.
Keep improving it!