I thought for a while this thread was hijacked. Now I am not sure. What you are doing is interesting but unless you actually get something done, its like listening to grandpa Simpson stories that don't go anywhere. You don't have the name recognition of Allison or Kantor, so even if you put this in a 4x for instance and tell us it is better we will need an easy and inexpensive way to verify your claim. We don't all possess your skills or inclination to invest the time to replicate your efforts so where is this project going? The crossover mods in the M&T thread you mentioned are easily replicable, your surgery and techniques are not. How will this serve the interests of AR4 owners in general after you finish? Otherwise, this thread should be a in Mods and Tweaks.
I am still waiting for you to restore 3a dome mids?