i dont know if he has been doing it lately, but Agent360 was going to furball lake in the DA almost every night. he has never, that i am aware of, declined to teach anyone who really showed an interest in learning the K4 how to understand the particular characteristics of the Beast. in addition he has created multiple training films on the 30mm tater chucker and practical theory on how to set up the crossing shot.
after Agent, i would say either Grizz or Scotch (when he returns) would be the next best in teaching the mechanics of flying the ugly iron. I rank them next after Agent and equal to each other not as a measure of skill level, for i personally think them all equal but different, but in their level of training patience and free time they are willing to surrender to train someone.
as to the benefits of the G14, well yes us noobs who cant shoot straight do benefit from the use of the gondies and all that lovely ammo. but as Agent once told me, if your willing to settle on spray and pray then take the large load out rides, but if you want to force yourself to improve your targeting skill then take the K4. you dont have enough cannon to rely on luck, you will have to learn to make your shots count or go home empty and without kills. those were not his exact words, but that was the point he was trying to drill into my head.
good luck with your endeavors