Lorica Hamata or Lorica Segmentata

[Crispvs]

I would suggest that it could be done by attaching extra rings at the correct points on the chest (you would have to sort out the positioning when wearing it) and having corresponding rings on the underside of the flaps of the doubling, to which laces were permanently attached. You would tie these down onto the rings on the chest once you had put the armour on and untie them again before taking it off. Having the flaps permanently fixed in place might create issues with the ease of getting it on and off.

On the matter of how mail and scale doubling was attached at the rear, a number of near complete Gallic mail shirts which were discovered a few years back are instructive, as their doubling was attached at the back with straps and buckles, meaning it was potentially removable.

Have you definitely decided on mail, then, rather than scale or a Kalkriese segmentata?

Crispvs