Jake, I'm a lefty as well. I am going to remove the sanding head, then remove the 4 bolts that attach the motor housing to the head and turn it 180.. that will make it a lefty, I think.
That will move the switch to the opposite side of the tool (which is not a bad thing... It It still leaves you (or at least me...) with the belt on the "wrong side, or else applying the belt in the wrong direction. (Which it does have a platten for... Nice....), however it makes the nose wheel a little dangerous that way. It's not like juggling chain saws or anything, but it'll let you know in no uncertain terms when it makes contact. So I'm banking on leaving the belt off to the left (which is "outside", when it should be "inside", but that's how I've learned to run my pneumatic ones, which are fine that way because they allow me to get my hand all the way around the handle area.
My belief is that I'm gonna be the most comfortable with the tool in my left hand, switch on "top", under my thumb, as designed, and an old grinder handle in the "top" position (in angle grinder speak, which not all angle grinders even have), or "right" position in this sander when it's held in what I presume is the designed position.
That is the same "out of position" position that I use all of my pneumatic air files in, so I'm going with that for now. (band files... I've always heard them called "air files", and I'm sure it's not probably correct, but it's well engrained...).
I'll say this- If flipping the body gets you in a more comfortable place, you should do it. That makes or breaks an angle grinder regardless of what you find comfortable (within reason of course...), as grip and control and stability are what matters. That's one of thoe things that is different for everybody, and I'm quite sure that it'll apply here too. If that makes yours work better, it's an easy thing to do.
I played with it some more. I'd be absolutely blown away if I've got ten minutes on it. I deburred every sharp edge in my scrap bucket. Not sure if it's the belts, the grit, the low speed of the tool, it seems more suited for a lot coarser work and heavier removal than the air versions I have. Whenever I get "real" belts for it, that'll tell the tale, but it puts a ding in my idea of a finishing tool to keep on the bench. Maybe. But it also opens up a lot of other possibilities. I am really seeing a use for it as a "vise mounted mini-belt grinder". Not permenant for sure, but I might do up a bracket tonight to see how that works out... Or maybe another day. I hadda work both days this weekend, and now the gooberment is sending me to bed early. Life is hard.