All I've got, other than compliments on a very nice build, is one comment on the color scheme.
There's a lot of unbroken red. I find myself in the same situation sometimes, thinking of colors for sections like nose cone, main tube, payload tube, and fins, then having this great big expanse of a single main tube color. One solution I've use is to add a band of something contrasting. I've got a very similar LP that I threw together in a hurry out of spare parts: red nose cone, black body tube, red fin can. Too much black. All I did was add a 1/4"-ish wide band of gold about 2/3 of the way up, and it looks 100% better. Something similar could work here, if you want it. Make it more like an inch wide for this rocket, gold, yellow, white, purple, or anything you like that contrasts well against both the red and the black.
I had a few other comments, but others have beat me to them all, so I'll just end by repeating: very nice build. Well done.