Icetrikes...
Wow, that looks like fun! While out on the Nomad yesterday, I spoke with a fellow riding a tadpole trike of similar design to the Icebike. I asked him if there were any drawbacks. With a sheepish grin, he said he went through a lot of rear tires. Howzzat? I asked; in response he rode away like mad, cut the steering to full lock and squeezed the rear brake. Presto! A perfect 180° turn.
He said it is addictive and...I believe him!
Best,
Dan. (...who thinks going 'round in circles would be a whole lot of fun on a recumbent tadpole trike)