I am not sure this is the best for rocketry, it would seem that most printers are, but I wanted/needed a new printer, and found the Ender 5 S1 on a pre-order. I watched a number of video reviews on youtube, and read a couple written reviews, then found a sale of $503 plus free shipping at Creality.com. Should arrive between Dec 26 - Jan 5... We'll see, since China shipping is reall slow now.
The build volume of 220 X 220 X 280 is a little smaller than my Creality CR-10S, but I have the CR-10S for this purpose anyway. The CR-10S just needs a bit of tweeking, and I believe it will come back around and stop its 'stringing' trend.