Per plan, I installed the three AN3-13A pivot bolts along the longeron for the C2-L. Instead of the C1-L (the long handle), I replaced it with the third C2-L instead. The reason for the change is because I have seen some much better not-to-plan locking mechanisms (by other Cozy builders) and I decided to follow... more on that later. To make sure all the hooks are synchronized, I used a dial level, placed it against the edge of the hooks, while I adjusted the length of C5 and C6. The only problem I encountered was that the C6A was rubbing against the seat back. Most builders bend the tubing a bit to prevent it from rubbing. I will probably do the same, but for now, I left it alone. The little friction seems to keep the locks in place.

I took precise dimensions of the latch mechanism and transferred them to a drawing (using my Corel graphics software). I printed them out on thick report cover paper and cut them out for paper simulation. Once I got it working correctly on paper, I took down the final dimensions and made them out of thin aluminum.

Here's a picture of my trial latch mechanism - I have yet to beef it up. I just wanted to see its functionality at this time... The handle will be sitting right in front of the control stick, providing some warning in the 'unlock' status.

Here's a picture showing its 'lock' position. My initial thought was to make the handle a folding arm with a safety pin at the handle tip. Once I fold the handle in, the pin will go through both latch arms, thus locking them in place. There is no way the latch will open without intentionally un-folding the handle back out and disengaging the locking pin in the process. Note the foremost latch that is a C2-L instead of the long handle C1-L.

Once I trial fit the latch mechanism, I replaced all washers with spacers. My small table top lathe comes in handy for these types of turned parts.