I've 'mastered' these as far as sets and reps go, however they are still really shakey and the iM is not quite there yet but loads better than it has been, so looking for pointers on what to fix for both of these. The angle makes it look like the iM was not up to shoulder level though even though it was so I tried to video it at a better angle for that one. I've also been working them alongside some short forearm headstand sets <12s while I work on getting the form for that one down, I figured the extra practice might help make these easier and smooth an eventual transition.
PE + iM
iM at alittle better angle