Flaminheli, The 610 is a good conversion. I think any decent engine can be converted. That being said it all depends on your skill set and the machinery available to you. I am lucky in that I have a Bridgeport mill, Clausing lathe and drill press at home so for me it is easy. They all take effort and thought but at different degrees depending on the engine. Bottom line is you can save half or more over buying a "branded" engine. I once bought a case of Echo 23.6cc short blocks for ten bucks each brand new. A new G26 is over $300.00 and doesn't include the CH ignition I use. I had less than $150.00 in a complete engine on EI. The other benefit is that of the looks on some of the guys faces at the field when you run as good or better than their high dollar engines with your scrap. My offer still stands if you are interested.

Capt,n I can't get a picture of the other engine I referred to. But it is an REC-600 from Echo and you can pull the manuals from their web page.