I'm with William, they are catching up on the ugly race with Evolution. To address some of my thoughts to one of the posts:

1, Like William said, No chrome in the AX. Last OS sport engines I know of that used chrome was the FSR's. I understand that some of the high dollar buggy engines use chrome plated sleeves.

2, I would venture tho guess that a great number of models that this engine would be suitable for would need the nose weight if this engine was used. Lighter is always better until you have to add dead weight to compensate.

3, Looks like a thunder tiger 120 muffler with square corners. Like the muffler's TT cousin, this one will probably prove to be easily vibrated lose and very leak prone due to too many screws and joints.

4, even if its at 220, OS has so many "OOP's" flawed designes out there to where I would risk 220. A TT 120 can be found for that or less and the Webra is out there too.

5, King again??? 2 strokes are king, look at the Moki 180 and 210, the Webra 160, the list goes on and on.

Lets hope that OS did something right for a new product (for a change). The last 9 OS engines I bought new were returned for service a minimum of one time. Three 46FX's and two 32SX's spit the nickle. The OS 70 heli engine could not keep a rod or bearings in it. The 160FX went back twice and was still junk after second brand new replacement. OS 50 could not keep bearings in it. And finally the wonderful new lightweight 70 four stroke that was a gift, it would'mt run worth a hoot. These engines all went back at least once and every time Hobby services was given the opportunity to return my money and keep the engine, which of course they refused. Only one of these engines I have now and that is one 46 FX that I forced HS to fix the peeled sleeve with a steel sleeve and a ringed piston (from the heli engine) and it still runs fine. The remaining engines went to ebay.

OS long ago forgot about the exceptional quality they built their name upon, now they are using thier good name to sell sub par engines. 20 years ago, I used to see the above types of problems I had, with other makes of engines, namely TT , ASP, Royal and the other OS want-to-be's. Now, look how the tide has turned, the once great OS quality is worse than even the average Chineese engine.
l was an OS fan, that's why I gave them so many shots to keep my business, after all, I am still running a Hanno 60 on a regular basis and two 45 FSR's very regularly. But when they get tired, that's it, no more new ones. On twelve current planes and helicopters, the only OS's I'm running are the FSR's and the Hanno, no modern OS's.

Too many good motors out there to be bothered with sending them in for warranty work. Buy an Enya, TT, Webra, Moki, MVVS, Saito, YS and yes, even a Fox, same or less money and light years ahead in quality.