What about from an angle leaning over the side of the wheelchair? Don't forget, from a sitting position, I'm close to a foot shorter than someone who is standing. As well, I'm fully capable of leaning over far enough to pick something up from the floor and I have a great deal of upper body strength, so leaning over if needed isn't a problem. I guess I'm just theorizing at this point. I'd never know for sure until I actually get my hands on a porta-nailer and actually try it out.