it will still be a while until I start working on this move but I just started wondering something. If you started at F1 and progressed to this point, at what cycle were you able to start the tuck planche? Did all the shrugs and the leans prepare you enough to keep your shoulders protracted enough?
There are a lot of progressions in F1 where I was able to jump in to then 2nd or even 3rd cycle, but it looks like this might take a while, especially with the iM.