I just got the chance to finally try this one, and I gotta say I'm positively impressed!
It's quite a good RS124/438a recreation, definitely closer to any 124 revision than the effort from Soundevices Digital if you ask me, so definitely keep it up Tunca!

I should point out a serious "flaw" that keeps this from achieving the 124 character: the release times are too fast.
Even the slowest release setting is faster than the fastest setting on the original (I compared it to a 60050A rev, but I imagine other revisions will have the same release times more or less), so it would be great if you could tweak the code to allow for slower release times, or maybe add a switch to multiply the release time by a factor (say, 10x), to allow to easily switch between "older" and "more modern" release times, that would really make it interesting for people looking for a substitute for the long-abandoned abbey road plugins.

Now, for a next emulation, how about the TG12413/Zener limiter?