IMO;
Need? IMO, Absolutely.
I look at the CDL thing this way.
A good lawyer could probably convince most juries that federal law trumps
any state law, so if you did damage, property or life, and if you do
not have a CDL and current medical, they could get a conviction and go
after your assets, you stand to loose everything you own.
Sure, you can buy commercial insurance but if you wreck and you have
no CDL I believe the insurance company can say "SORRY!" Your on
your own pal!"
If your worth a few bucks and do not want to gamble w/ it just get a CDL, it is easy
as you see, you aced the air brakes section you said, now you just need
to talk the talk while doing a pre-trip inspection w/ an examiner listening
and drive the truck with them critiquing your ever last move. In my
case I was trashed 16 times for not looking in my rear view mirror THREE TIMES
in a every turn. THREE TIMES in EVERY turn! It's in the CAL Commercial DMV manual.
I still passed though.
But I still learned from it and I do look more now.
Everyone is a he man, a tough guy, I can drive anything that has wheels mentality. Well,
sure you can, but w/o theory your a liability, to yourself and others.
If getting a CDL is really hard for a guy, then a guy should not be driving these monsters
on public roads.