15 inch chute. I flew mine on an E-30 something with a 4-6 second delay. I know the walls are too thick. I made it that way on purpose and lowered the infill.Got mine printed in blue and white. I may print another one in pink for my wife. One thing I note is the walls are a lot thicker then they need to be, could easily go half the thickness or less and still be plenty strong enough.
I like the fact that you use a paper motor tube. This will help prevent the plastic from deforming from the hot motor.
What did you use for the motor tube, and what size p-chute did you use?