Ok If you think instructing is they way to go thats fine but I would put money that a pilot from gulfstream flying beech 1900 does not learn anything. You are flying 121 not part 91 you fly into the big airports such as miami that does require high speed approches a lot of the time. we don't fly the ILS at 70 knots to the GA airports you learn how to deal with dispatch crew schedling also you are flying in all types of weather not just under the hood. SO you may have an advantage in the teach aspect of it but that would be about it. Also the pilots at gulfstream hand fly the aircraft we do not just push buttons as there is no auto pilot. Also if you think you can handle a 441 why not try it and see that you will be behind unless you take some sort of prep course some where