I can't imagine feeling comfortable after doing only two man scopes.
Agreed. For the one-man scopes, I tend to do mostly left-hand steering, right hand pushing, but when I need both hands for the steering, I use my left pinky to hold/manipulate the scope about 5cm outside the anal canal. It works pretty well.
As for reaching the cecum, I'm with you. While the textbooks would say that the sigmoid is the hardest part, I think the right colon is the most difficult. I think it's important to have good help (i.e. people who splint the abdomen intelligently), know how to manipulate the scope clockwise/counterclockwise as you remove your loop, and knowing when to give up and switch the patient from left lateral to supine/right lateral.
For the lap choles, I think doing them
completely alone, i.e. without staff
or a junior resident, is key to true troubleshooting. When I do gallbladders without intelligent help, I will prop the right lateral port (GB fundus) to the drapes with 2 hemostats, have the scrub tech run the camera (which can be painful), and work with a peon in the left hand and hook electrocautery in the right.
When I walk new interns through a gallbladder, I typically have them use their left hand to run camera. If a student is there, then the intern's left hand is reserved for sterile high-fives. More experienced interns and anyone beyond that are forced to operate with both hands whenever I'm in charge.