The original post disappeared but I did repost some of the details here:viewtopic.php?f=11&t=16964&p=86942
If I was doing it again I wouldn't cut the original mechanism at all but would reshape the rudder blade to fit (one of Roadrunner's suggestions)
Ignore the extra lines I added back then. This was before the separate up/down lines came out.
I have recently upgraded to the full twin up/down lines using an Adventure upgrade kit. For that to work I had to tie down the older pull up rudder mount to the little brass hull insert.
It was an easy fit and works well!