Thanks for that link, that product looks wonderful. I gave them a call about that Smart Drive earlier today, hopefully I will get a call back soon, so I have some kind of comparison to the e-motion she tried the other day. Like you had mentioned, the weight of those wheels kinda raised an eyebrow for me here, and I'd love to have a better option.
*sigh* Ergonomic techniques huh? Ugh. So much I hadn't thought of...and I'm sure there's a whole lot more I'm not thinking of just yet. Your input is really appreciated, thank you for that...
If anyone else that uses the e-motion or any other system wants to chime in with the pros and cons of what they've found, please...feel free!