Hey RoysterDW there is no need to panic the engine has been around for 3 years and it has been a reliable engine. What Tomyrcmodels is saying is that he found a way to make it better. As far as the leg that he is referring to he means the mounting bracket on the casing on the engine. The mounts are strong enough to hold the engine so you do not have to worry about it braking. I have been testing and flying the engine for some time now. However, if you crash your plane in a nose dive the mounting brackets most likely will brake. Most people are used to have a few crashes and be able to take the engine out and put it on another plane and fly it. Well, as you probably already know this is not the case with full scale aircraft (of course they are more complex). If a full scale airplane crashes you can bet that you will have to overall the engine (if it can be saved). We as modelers have been spoiled by enjoying products that are simple to manufacture and operate that can also withstand a pretty good beating.

In case the SPE engine mounts brake, there are after market back plates that bolt on the casing of the engine allowing you to re-mount your engine back to the model.
As far as power goes, the engine it is what it is, not bad for the money you pay. If you want to get more out of it then make the modifications and you will enjoy more power out of it. Tomyrcmodels is saying that after three years he came up with an engine that addressed some of the imperfections of the engine. Just like any manufacturer that tries to improve its product. Have you seen what the prices are for a DA 50, a ZDC or a 3W engine? They cost at least double the price of this engine at similar displacement (the DA is 10 cc larger), (it is understood that these engines perform much better than the SPE stock) but you get the idea. So overall for the price you pay this is a pretty sweet engine that will give you reliable operation for some years to come. Every time I fly my SPE engine at the field people approach me and ask me what kind of engine is the one I am using? Of course mine is modified, nonetheless people are curious to find out about it. Once you get hooked on gasoline you will rarely go back to glow power. So there is no need to panic. If you have any other questions just ask me.
Take care