Never thought about it so I checked mine. Other than the tiller question, all my TD limbs look like they could be reversed except my Blacktail Sitka T2 and Stalker Wolverine FXT. That is due to the way the way the riser and sight windows are cut.

I am not sure about all bows, I do know with a DAS Dalaa you can swap the limbs to change tiller. The bottom limb is stronger, interchanging it with the top limb gains the result of positive tiller.  

David Soza has written a thorough review of tiller that you can google. He discussed swapping limbs to tiller tune his bows. I would not try this with anything other than DAS or ILF risers and limbs.