Do not change out the P19 rudder system for the 6.0 system. The P19 rudders work much better than the 6.0. The rudders on the 6.0 are way too small. The lockdown mechanism isn't as good in my opinion either.

The most common problem with the P19 rudders is:
A) The springs need to be replaced.
B) The lockdown bolt is bent.
C) Someone has messed with the system trying to fix it but does damage.

PM me if you want to talk about it. It's been years since I messed with a P19 but I have always been fond of the boat.

If you want to change the rudders for something superior buy the rudder set off an old H20. I really liked that rudder system. The I20 is nice too.