Greazy gave you some very accurate advice that I agree with 100%.
That is a great cycle. The dbol will blow you up and have you feeling great. By the time you come off the dbol the long esters will be fully active and you will get a great leaning effect from the tren that should pull some of the water weight off from the dbol.
Make sure you run the test at least 1 week longer than the tren as well. So, I personally would run the test for 15 weeks and the tren for 12.
One last thing that was not mentioned, or at least I didn't see in your sig was HCG. In my opinion it is IMPERATIVE to run Human Chorionic Gonadotropin (HCG) whilst running tren. Tren shuts you down hard and long. It is difficult to recover from, even with HCG.
I would start running the Human Chorionic Gonadotropin (HCG) on week 2 and continue running it through week 16. That way when the test has completely cleared the system, the Human Chorionic Gonadotropin (HCG) has as well. Then start PCT on week 17 and run that through week 20.
Don't run Nolva; use Clomid instead. Although it isn't quite as big of a deal to run it once the Tren has cleared the body (19-nors + nolva concurrently is a no no), it still would be more beneficial to use Clomid. This is because Nolva inhibits IGF-1 production, which as you can clearly imagine is a terrible thing when you are trying to maintain your hard-earned gains from such a wonderful cycle.
Other than that everything looks spot on. I know it is quite enticing to get back on as soon as you can, but I promise you: good things come to those who wait.
Best of luck with that cycle!