Twings and Spinnakers

I noticed from the video of California Girl that she uses Carabiners to attach your twings to the guys and it looks like jib sheets as well. I used Carabiners to attach my jib twings last season but had a few "issues". We started with non locking ones and it is amazing what they can attach themselves to. The lifelines being the first. We switched to locking ones and that solved that problem. For a couple of reasons, I am switching back to adjustable cars for the 155 jib and keeping twings for the 90 as we don't need to use that sail off the wind as much. As some of you know, I am new to spinnakers. I have been racing all winter at the advice of members of this group on a T-10 to learn the spinnaker drills. We practice every Thursday and raced 6 times so far. I was thinking that the twings would have to run more freely on the spinnaker guys so bought some of the new T-2 blocks for that. But seeing California Girl and her Carabiners on the guy makes me wonder if that isn't perhaps the better way to go afterall. It is certainly an advantage to be able to clip them on when you decide you need them. One final question. I am planning on doing end for end gybes just because that is what I have learned and people say it is good up to 35 feet and Papoose is a small 36 foot so I was thinking close enough. Which kind of gybe do people do on the various size boats on this list? Allen