Just had a talk to my mate about his dual stand conversion, a fair bit of welding and manufacturing involved. He is going to weld onto the existing stand the necessary bits, and use a modified spare side stand. You need to have really good welds, and there is also a problem of water getting into the tank. The drain is on the left hand side, and you would have to be careful when opening the cap so as not to let water in. He is looking at putting another drain on the left hand side.
Regards Martin.