Woa, Jim!
Boy that is a REAL storm starting question!!
If you search RCU, you will find a bunch of threads on the MDS engines.
They run the gamut from "I love 'em", to "only good for boat anchors"!
Apparently MDS DID have some QC problems, just maybe they are cleared up.
I have two 1.48's that I have not ran yet(haven't put together a plane for one yet), and a .78 in a US 60 that just runs absolutely super! Great idle, transition, power,etc.
So, at this point, I guess I am in the "I love 'em!" camp!!
Pud