Upgrade
I have just finished this task on my H45. It's a big, fairly nasty job. You can almost count on needing to buy a new forestay and fittings, since it is doubtful (but possible) that your old one will fit. You will almost definitely need a Norseman fitting even if you can use your old headstay.I recommend you use a professional rigger to do this job; I started mine and had to bail out in the middle after I realized that I didn't have sufficient knowledge to continue. You will need some measurements:1. The diameter of the pin that links your present system to the stem fitting.2. The length of your present headstay *under it's present tension* - very important. Get the length from top to bottom pin centers very accurately.3. Your headstay diameter.This entire job appears to be much easier than it actually is...again, unless you have done this before, using a rigger is a good idea.I have a Schaefer system and highly recommend it to you. Also, check out the Schaefer stanchion blocks that lead the furling line outside the stanchions - very slick setup.The best price I found was from rig-rite (www.rig-rite.com); talk to Kim. Being in California, I didn't pay sales tax and I got a good deal on my system.MC