None of the systems you are talking about are a problem to keep working well, though any bow, including single cams, can get out of tune. The important things are a good string/cable set, and someone who understands the system. If you have a bow press, that could be you, with a little research and practice. True dual cams are not the problem a lot of '90s media BS has made them out to be. You can easily feel when they are a little out of synch. Twist a cable a little, and it is back, and usually stays that way. I have an older 2 cam that has Winner's choice string/cables, and it stays in synch for a year after initial setup. Hybrids? Hoyt type hybrids need to be synched much like true duals, but again, they stay put once you get them set. The slaved duals (binary cams) need to be synched too, and this should be done at full draw, so it can be a little trickier. One thing about them is they have a very "locked in" feel at full draw, which can be nice when hunting. They are not something to be afraid of, just something to learn about.
