Is that ZCI the customers? I don't see them on your site
The SHS tappet plate I purchased from the site doesn't seem to like stock KA sector gears - the back fin does seem quite a bit different than others in shape when I'm browsing about.
Update: Tappet plate wasn't the issue - SHS v2 tappet plates work fine with stock KA sector gears.
Still wouldn't mind giving a ZCI a shot tho!