I flew the C-1 Eclipse, not the Katana. The seats were nice except for the lumbar issue, at least for me. But overall, it was a really good airplane and fun to fly.
Also, to add on a PPL A to your PPL H, you need 30 hours, not 20 (20 dual, 10 solo).
http://www.pprune.org/private-flying...a-ppl-add.html