Hopefully, the 27th time’s the charm!
Grant Imahara, Mythbusters
I made the casing 20 design in begin December 2020, and made a total of 4 (R-6 to R-9) in the following 3 months.
R-10 Test Results
The 10’th rocket test after rocket 0, the 5th casing 2.0 iteration, also being the first to not suffer from miscellaneous structural failure