I will get off this bed to try a bunch of chairs from a freind (a dealer) inc the front drive permobil F5 and some mid drive chairs. He will let me program them so they steer. Partly because bored. Partly because people that use them tell me that they handle great. From memory some years ago, I would have to disagree. But its hard to tell with stock programming at a show or 3 mins in a hospital meeting (spinal injuries unit) as its so slow to respond that you cant "feel" whats really happening. And theres no wet leaves, angld pavements, grass etc. And the programming prevents you from throwing it around as I usually do. Its like driving a slug that only goes fast in straight lines on good surfaces.
I already know that I hate the rear swinging about behind me indoors. I tried front drive before. It feels like you have a huge tail. And it makes manoevering and changing position in a kitchen or at a computer or something very unweildy. I take out furniture and people feet with them at the bar. Or I did when testing a front drive sunrise chair.