I gave a small allowance for the silver stripe on the wasp waist, then measured what was left of the white portion of the body tube and divided by 3. That gave me a stripe section height of 83.3mm. So I cut a section of Monokote trim just slightly larger than that. The lower stripes are 3/8" wide, the two middle black stripes are 3/4" wide*, and the top stripe is 1-1/2" wide. The cutouts in the top stripe start 1/4" from the top, go in 1/4", down 1/2", and back out 1/4". This will allow the silver black brant logos to be placed later.
My best advice for doing the roll pattern is to go to Madcow Rocketry's website and see their diagram on how it is applied. It is a complicated scheme but certainly not impossible if you just take it one step at a time.
Start with the lower stripes. You'll need a master stripe that sits midway between two fins. In order to ensure the upper launch lug stays out of the way, try to arrange the stripes the way I did - if you set the rocket upright and look straight down on it, rotate it so the launch lug is on the top. Your master black stripe should sit in the area on the lower left. You can see in the pics below that I am showing the master stripe, with the launch lug sitting up (clockwise looking down the rocket).
After the master stripe is laid down, I recommend attaching the stripe on the opposite side. This stripe will need to be trimmed to fit around the fin. Take your time on this one.
Next, add the remaining two stripes. On my rocket, they each sat against the fins to get even spacing on all stripes. So that worked out well.
You can see how the second stripe attaches. Here's where the * comes in from earlier. Madcow's diagram shows two different widths on the middle stripes, and I cut mine the same width. My Estes kit had them the same width, and positioning them was super easy, so I just went with that. If someone gives you crap over the width of your middle stripes, you have my permission to use the BBII's conical nose cone in mean-spirited and nefarious ways against the perp.
The top stripe is last. Line up its left edge with the left edge of the lower stripe. I thought I got mine down well, but looking at the pics below, it may actually be off just a bit. So when I get home from my trip I'll have another look at it and decide whether to cut and place another one. That's the beauty of these monokote stripes - you can do them over until you're happy.
So that's how she sits now. When I get back from my trip I'll get the silver on and figure something out for the CARDE lettering. I cannot tell you how absolutely pumped I am to have such a bad ass little Black Brant II in my stable! I'll be sure to get more pics in as the finishing touches are placed, and will definitely get some flight video. Unlike my OOP Estes kit, I think this one's going to be seeing lots of flights! Exactly what I wanted - a stress-free Black Brant II that I made all by myself, and could easily do again if needed!