A slider on a Rocket, if not latched stays shut from experience.
I have no plans to repeat the test. It was a very sinking feeling, reaching to unlatch on rollout only to realize I took off and flew 1/2 hour that way.
This was a carry over habit from winter, as I often need to open the canopy 4 inches to scoop air with a gloved hand to de fog the inside of the windscreen just before take off. It was spring time with no need to clear but it was not latched! After that event I have a
keen alertness for the prop wash tone present when not latched
Donaziza, what does that device you refer to look like?