We are here for you Michelle!

Even though mostly people are doing 12/12 at the moment, there are a couple people doing some variations on that, and several of us who have shot TID at one time or another. I never really got the hang of it

so can't give you a lot of advice, but I am here for moral support. Others are too, though people don't always post to each thread, there are still peeps around who are pulling for you guys!!!
With Bix (on BID, guess he got better overlap than a lot of kitties) it got to where I could predict where he was overlap-wise and adjust doses accordingly. With him it was generally cycle 3, sometimes 4, of a new dose. I think that is the "waiting a few days" concept, to let the overlap build up & see if there will be enough of it to help. When Bix had good overlap, the change could be dramatic, from ho-hum #s one cycle to amazing #s the next.
With TID it's more of a factor - no insight on when it is likely to be there (overlap), except as Terri said to watch the zoom rate. With Bix sometimes I would test maybe +11 and then +12, or a +12 and a +1 after a shot. If the #s were flattish, voila, overlap. If the #s were rising a lot, I knew he would need more insulin to hold the #s steady, let alone bring them down to a nice nadir.
You are definitely getting the hang of it with what you are learning. ECID, and it takes some experimenting and learning curve to see how your cat responds, what works & what doesn't, etc.