I have a whole hour of dual in a T-craft, so I'm a long way from being an expert. But as a long dormant CFII, I suggest that your floating is likely from too quick an approach speed. A Google search shows that the T-craft's stall speed is 35-40 mph, which means to me that your final approach speed should be around 45-55 mph--and I would choose the lower end of that range. Or you can use the mountain flyer's method, which is to get up to a safe altitude, find the indicated stall speed, and multiply that by 1.3, and then use that as your indicated approach speed. It won't be perfectly accurate, but it'll be close enough and safe to use. And I'll bet your floating will be a thing of the past.

Cary