Ok... a quick rundown on the GB/Y...
there was a selection process by USAJFKSWCS to choose a knife to be issued to and used by graduates of said institution... of the 200+ submissions it was cut down to 4 or 5 (IIRC) true competitors... some of the requirements were - no longer than 8", the sheath had to be jumpable, it had to be durable, and it had to be completely American made. After a brutal vetting process the Chris Reeve/Bill Harsey design won. I have both versions (GB and Y) both have been signed by Bill Harsey, both have been used - But- the Y is now on a plaque in my office and will be used for certain things (Native American spiritual ceremonies where another SF medic uses my knife for offerings or if the zombies attack). The GB/Y was designed for hard use, and some of you may remember when there was an internet video that claimed it was not all that was claimed ... well, that video was not 100% true - one of the knifemakers not chosen by USAJFKSWCS tampered wit hthe knife in the videos to make it fail, and, well, he still had a hard time getting that failure (overheat/supercool of the blade to cause brittleness, then still having to use a 16 lb sledge to break the blade....). I own one of that knifemake's blades - it is a fine knife, sturdy, no nonsense, comfortable, and Bill harsey asked me to break it by fair means and hard use - I don't think it will happen; Bill has also aksed me to break any of his knives that i own - again, I don't think it's going to happen.
EType- use the knife, you probably have one of the S30V blades, the latest is now in S35VN (Chris Reeve helped develop the steel and it has some better features that I won't bore or confuse you with - check on ps.com for the knife materials science thread to get an understanding, then we can discuss it that thread is about 30 pages long). Get a good Norton Medium/Fine stone (grey/red) to sharpen it, or get a wicked edge system... I'm a freehand sharpener, I use the norton with good oil (lansky, norton, wd40 or food grade mineral oil), a Japanese Water stone (1200 grit), then a bench strop and green polishing compound to finish edges.
You can baton the blade on the GB/Y, or do fine work... the only knife I have that's better is my Spartan-Harsey Mod 1 #061/250...
did you know that your Yarborough comes with a lifetime warranty against damage or breakage if used properly? There have even been a few replaced from use in combat, because that's considered proper use... You are not going to hurt it... It's a tool for hard use, not a safe queen.
DOL Bro.