super borec has a really good saw 462 to I heard only praise but he has straps of competition Husqvarna ,,, surely you also have saws of this brand but although the old 266 2662 365 have what is certain is that the 5 series, although the design is timeless design has not yet convinced

You're trying to play a tough pro, but I'd say in your case, it's just such an accelerated amateurism.
The undercut undercut it shows professionalism ???
You have two shallow wedges and when you tap them to the stop, then there is no other option but to cut it to infinity until there is nothing left ??? Is it professional? Is it safe?
Doesn't the cut remain intact and evenly cut after the main cut?

I dont understand why you guys in Europe use such short bars. A 28in bar and doing a traditional cut rather than a bore cut would save you 3 minutes per tree. Thats a lot of wasted time.