We decided to back off going further with the DAC-60.
It was difficult to deal directly with the company that makes them and they were unresponsive to our request to have units made for us in a custom fashion.
I have two units left.
One with a Silver face plate has the stage 1 mod plus various extras that are too numerous to list. I'd take $1,200 for it.
The other unit has a Black face plate and has an all out assault on the upgrades. It took months to determine the best parts to use in each location. The result is outstanding. The goodies that it is loaded with dictates a $2,000 price point.
If you are interested in either of them then let me know.