RE: best to worst engine???
Ah Gizmo, I still have a .58 MDS that I ran almost three tanks through, it was/is the third one sent to me by Horizon plus a new carb. The first two the case broke then they tried to make a better carb. I have one .68 that ran well but it doesn't draw fuel after being in the box for 6 months. I have another one that worked sometimes sitting around in the shop. None of them are worth working on. That was a live and learn lesson. Never seen one that lasted except my one .68, that one was great for quite a while.