Check your C.G., mark it, and start moving it back in small increments. -SERIOUSLY, just do it- when you get it back to the perfect neutral, but still stable point, the airplanes slow flight and landing characteristics will be totally transformed. A properly balanced Ultra-Sport is one of the sweetest landing intermediate designs ever.

I've seen the situation over and over for decades, where guys are flying their airpains noseheavy and wonder why they land like homesick anvils.
(I was that guy once upon a time, until a very good friend was stubborn enough to get through to me, and get me off my butt finally to take the time to trim my own fleet's C.G. to bring out the flying qualities they were designed for) It was a revelation to me, just how wonderful they could have been flying all along.....

The suggested C.G., (or forward portion of stated C.G. range) in the instructions for the vast majority of kits AND arfs is just a safe, conservative starting point...