wow thats kinda complicated.
I’ve got a Kickr 2017 direct drive and have mostly used Erg mode in big chainring. In my experience it just requires coordination between your brain and muscles. Nothing fancy, just “hit it hard” about a second before interval starts.
Some specific words on what I mean by “hit it hard” (or “dump power”) can be found in 3 posts in this thread:
Recently I started using Standard mode (level 3 setting), on this workout below from 3 weeks ago pretty sure Erg was off and Standard was on for the entire workout:
and a closeup of one 5-second sprint:
They don’t always go to plan, here is Ebbetts from over a year ago:
and later that same workout I got the timing right:
No need to overthink it, just give it your best shot and don’t worry if timing isn’t exact. You are working on a stronger connection between brain and body, can’t do it wrong! Quite often the TR Sprint interval under-reports because my best 5-second power is offset by a second or two, so don’t get overly focused on what TR interval report.