MDrone,
We used both a Bricasti M1 SE and M3 for the design of our Finley Audio Cirrus Power Cords (well other products were used as well)... We still want to get our hands on some M28s for evaluating as well.
We even sent some of the cables to Brian Zolner at Bricasti to use which he is using on his home system to evaluate his products.
If interested let me know we can get you one.
You can reach out to me on here or I can give you my e-mail/phone to discuss further if you like.
-Dan Halchak