Other factors than more use and experience have contributed to our willingness to push the boats limits (and ours )
# New standing rigging all round double swaged, done over two yearly haulouts .
# Extra forestay to act as a redundancy in the event of problems with the furler stay, with its 7 possible failure points .

# Replacement of shackles with clips to allow quick disconnect of rigging bits if problems occur.
# New stronger storm boards , (one piece) and improved front hatch lock.
But the best improvement I personally think, that has improved the sailability of the boat has been the addition of the raised aluminium toerail. Spritzig II came with no trim on the gunnel. During my first few years of sailing I only had some plastic trim protecting the rough join while I decided what to do here, timber, aluminum or toerail . I ultimately picked up some cheap secondhand rail for I think $60 . A bit of work to fit but worth the effort .
I am not infirm ...yet but at 57 with a stuffed back I'm noticing my agility is slipping a bit lately and the toerail has given me confidence to clamber around on my deck when healed and wet and in rough water . I've sailed on a few larger vessels and some only have a bump in the deck on the egde ....scary at heel. My mates Court 750 has sloped side decks and it's scary even on the mooring .

Not expecting people will toss their varnished timber toerail as I would have gone that way had I not found my cheap aluminium but if anyone fitting or refitting their boat is tossing up what to use , its worth considering.
Rail is shown on the pic is on first post on this thread.
http://www.investigator563.com/forum/vi ... st+raising