If I was guessing man, and I'm not I would guess some engineers from long ago decided that there was a marked improvement in a rigid rotating assembly that fully supports the crank-pin with double cheeks/counter-balances.... It's obvious to me that a fully supported assembly will in fact run truer as oppsoed to cantilever design, such as ZDZ, Zenoah, Brison, FPE, Air Hobbies and many other's...

Let's consider what the big dog's [3W and DA] in the industry are doing with there lower end's. Double cheek, single throw crankshaft's with bearings at either end of the assembly. Same engineering design concept Taurus use's on all there engines...

I whole heartedly agree with Diablo and Ralph's assertions on the complexity, merit's and tuning aspects of all model engines...

Attention to detail such as hand fitted, clearanced and machined assemblies, balance factor's or ratios that work, superior engineering concepts, timing and tuning procedures that offer the best real world results equals ====== Taurus Engines..........

I have done this, I suggest some other's do the same obtain a Taurus Engine and make the comparison... I know of several other's that have tried the rest achieved similar result's and now realize the Taurus Engines advantage...

Another mentioned long term reliability, most, if not all of these engines are designed to live for at least 1000 hours of use. This is already a known for Mahle [Sach's, Makita, Dolmar, Husqy]based engines and many other's. Some have yet to prove themselves...