jallred,
I have no experience with the Doyusha model - I haven't heard good things about it tho. Comments regarding accuracy, and poor quality come to mind. I have built the Nichimo Yamato however and can speak about that. From what I understand there are problems with this kit too. The tripod mast is backwards, the turrets are too narrow and the stern should have a flat on the end. There are also problems with the pagota. Some of these I adressed and some I just left alone. You can see pics of my version on my website - click on the www icon at the bottom of this message or go to:
www.bishophobbies.com
I have a write up on how I built it as well as a lot of pics.
Good luck,
Paul