I haven't posted anything from my X2 build. I want to wait until it is done. I'm hoping to have it done by Daytona.
Anyway, I want to help best I can, so here are some excerpts from my build that you may find useful and are welcome to copy.
I reused the fittings that came on my X2. Here are the fittings used in the X2. The SJ uses something similar. I do not know if you can order these fittings, or the Yamaha style fittings. The X2 has 4, and I only needed 2, so I am reusing them (no, I don't have good spares to send you). The threads were damaged, so I hand filed them with a metric thread file. They were in very poor condition. The one on the left is untouched. The other parts were soaked in "Chem Dip" for about 3 days total. I removed them and cleaned them several times during this process. No special tools, just a wire brush and a lot of soaking. Well, a screw driver and razor knife to get the green stuff off.
I believe the tubes I used are 1/2" PVC. I went to Home depot and got what fit the fitting. The fitting is metric so it wasn't a super tight fit but that is ok. I needed to get some 5200 in there anyway. I put 5200 on the inside of the tube and the outside of the fitting. I was pretty liberal but not messy. I tightened it up with a stainless hose clamp and gave it time to dry. The hose clamp alone made a tight fit, but with the 5200, it's like a rock in there. After that, I used a epoxy putty (resin, microspheres and cabosil) and 5200 to glue them in. I could probably have used less to get this job done, but the X2 is a mofo to work on (not a flat deck) so i wanted to be sure these never failed. That and it's a race hull with a lot of glass work already, so an extra ounce or 2 wasn't going to hurt. If this had been my SJ, I would have been a little more weight conscious.
This is the other side of the bulk head. These have since been trimmed down to the same length sticking out as what you see on the stock SJ. These are long for mock up.
Now, for my X2, I am running 2 650sx cables. One for my steering and one for my trim. The 650sx did not have a trim nozzle, so the cable lines up with the trim perfect. Here's a picture of the trim cable during mock up.
The 650sx cable is too short for the steering. I got a matching bolt and cut the head off, then used the trim hardware to connect my bolt to my cable. It's together solid. Here is a picture of the pump/control system fully mocked up and finalized. I have pictures of the extension but I didn't feel a need to include them. Buy the right cable for your needs.
Lastly, here is the control system. Again, my X2 is a race boat, so for now, I am retaining the complete QSTS exactly as you find it on the GP1200. The cables I am using are the shorter Waveraider cables (about 22"). You are not going to want to use the dual cables I am using as the end fit the Yamaha QSTS and will not work for a lever pull.
Anyway, the free ride set up is what you care about. It is very simple to convert to a up only fast lever pull, instead of the up/down twist grip system that is stock. All you have to do is remove the down cable, and replace with with a spring and a stop, then connect the up cable to the lever. The cable will be very simple, because the trim end is the same as the carb end on a throttle cable, and the lever end is whatever you want, so you could simply use a throttle cable, or grind the mount and use the Jetmaniac BB throttle cable (I have not mocked this up so you need to verify that this works. A X2 cable might be a good fit from the nozzle to the mechanism.
You gain a mechanical advantage by using this system. The return spring will keep your cable tight and the stop will prevent accidental down trim. If you need to increase your throw, simple make a bracket to extend the cable mount outwards, increasing leverage and throw.
Please understand that I have not done the free ride set up I suggested. I only converted my X2 to run this system in a stock manner. I have not worked this in my SJ. However, it is an old racing mod to do free ride mod I suggested. The racing mod give down trim for traction in the corning. You would be doing the exact same thing but in reverse. I am sure you can find more information on modding the system if you look up GP1200 and Waveraider racing modifications. This would be much stronger than just shoving 5200 into the hole and much easier to replace the cable, although, you probably wont be breaking the heavier trim/steering cable very often anyway.
I looked on Google images but couldn't find any pictures of a modified trim system like I described, but I have seen them in person.
Good luck and keep and eye out for my X2. I hope to be showing it off soon!