That is pretty funky looking, but to each his own. It occured to me a while back that if I ever wanted a square type tank for my bike I'd do a 2:1 using the tank off an old Ducati GTS - get 5 gallons and knee indents. Would be an interesting concept I think... I'll try to botch together a pic to get my idea across.
Here:
It would be tricky, but I am certain it'd work with the right type of welding. The 900GTS is not that much larger than the T100, and as the 2 sit side by side in my garage, I have given it a bit of thought. More from the Ducati tank currently on ebay, but as I'm bailing the state soon, and don't have the spare Triumph tank, I don't know if or when I will attempt it. Maybe in a couple years.