....But it is assumed professionals are running the machine so they are not quite as cumbersome as some of the hobby and consumer market stuff.
Thanks for the info guys!
Snrub,
I had to chuckle when I read this part of your post. When I was growing up there were still lots of family farms. Those "professionals" back then started at about 9 years old! I can also remember driving our two ton truck and having to sit on a cushion to see over the dash!
Yupp. I rounded a corner too fast with a 1950 1 1/2 ton Chevy on a gravel county road and put it in the ditch. Spilled some of the seed beans and a ten gallon milk can filled with gasoline for the planter tractor. I was 9 years old.
I was doing limited field work on tractors at 8 and quite a bit by the time I was 10. Started out on an 8N Ford and JD model B.
"Professional" is a rather loose term. I have met a few that were pretty unprofessional. And unlike me, they even had the credentials to prove it.
Edit: Which reminds me of a story. For my 20th year high school class reunion on the registration form was a place to put ones occupation. I put "Professional Farmer". When the little pamphlet came out with all the classmates occupations some of my farming classmates, having only listed their occupation as "Farmer", chided me a little and ask "What makes you professional?". I calmly just said "attitude".
I can also remember driving our two ton truck and having to sit on a cushion to see over the dash! 
