the carbs on MDS have more leaks than a Welsh farmer and the con rods are made from fudge. hey will run, but its not worth the bother.
a REALLY! good option is the LEO 37, mine is the strongest engine i have in this class and it runs faultlessly. for the same money as MDS you can't beat it, in fact, if kicks ass to any engine in this class. untill the West comes out that is. I also have 2 Magnums which are ok, but the bearings arn't up to much, the SC is a Magnum too. I hear only good things about Thunder Tiger