I can finally report that I have been able to use the supersend successfully.
Sent a few coins to bittrex, it withdrew double coins plus fee, half of coins returned very quickly then in about 1 min coins received at bittrex.
I had trouble in the past. I think it was because I didn't fully open the wallet. You have to open it and untick the box which says for minting only.
I don't recall this was explained in the instructions. This should be made clear so people know what to do. Also it would be good that supersend could be performed without opening the wallet. Can this be incorporated into a later wallet?
Wow that's great. Thanks for sharing your experience with community.This is most amazing technology ever.