SB, I am still recovering from a bout with Guillame Barre Syndrome, from 1989. After some three months of re-hab, I spent some 26 months in almost exactly your situation, in a Quickie, carrying a small 9mm - a Smith 3913 in my case.
The suggestions for CD and the car-carry version are good, if your physique is right. In my case, the upper body motion, when "moving out" put the muzzle of the gun into my hip when I bent forward, and even with a good shirt tail for cover (tucked in shirts in a chair only stay for a moment or two) it was difficult to stay covered when opening heavy doors (backing in, using one arm to open the door and the other for locomotion). I tried a shoulder rig for one day, and the blisters lasted a week. Finally, I did the illogical thing and went to a strong-side IWB - an Alessi MOB, worn at 4 O'Clock. Shirt cover was good, the kevlar back rest did not print, and the extreme cant kept the muzzle away from muscles that were beginning to return to the point that they could feel day-long jabs and nudges as discomfort. Car seat experience will tell you that this position is hard to draw from. Wheel chair experience is different. WC operators are used to the slight forward and back upper torso motion that goes with locomoting a ricksha, and it takes only slightly more to lean forward enough to draw. I still use this holster, even while driving, for the 3913, a SIG P220, and a Smith 4516. Same old muscles in back, even more tender and quarrelsome now, and the rig rides well for long periods without disturbing them. The previously learned access motions work well even with a seatbelt on.
