You seem to be having some troubles here.... I think you've posted this same question heree before but a little differently. I seem that you are a little confused about the definition of "sync" With reel to reel machines people used to do it by hand. Really there isn't any other way, so with casette 4 tracks forget it, you'll be chasing youre tail- you might get lucky though....
If you just want to bounce between machines, just get some good cable, but you will still have the degrdation of losing a generation. I'ts easy though. You just need to commit to a mix, not an easy thing to do, it becomes a mind game where you are allways second guessing yourself. Just alwaly get it good on tape the first time- it will make it easier...
-jhe