I'd figured I would keep up with Ashtanga Primary and 2nd series on Friday and Saturday but decided to drop Intermediate yesterday. Enjoying VK so much at the moment and wanted to work on a lotus sequence we developed on the course, so did that instead.
Full Vinyasa Krama lotus sequence with practice sheets and subroutine videos as well as a speeded up x4 full sequence here.
Note: I don't tend to think about rounding the back here, perhaps because I'm beginning from lotus rather than lowering down in karandavasana, the rounded back is more an effect of drawing the Knees up your arms towards your armpits, it's like engaging uddiyana bandha but while on an inhalation. If you aim your knees for your armpits your back is just going to curl.
Going down I tend to try and lower my lotus half way while keeping my hips high just like karandavasana and then while trying to keep the hips high curl my knees again towards my armpits and then try and glue them there as I lower eventually sliding the knees down the arms and back into your padmasana. For some resin I find it easier going up the arms than lowering the last couple of inches to a graceful rest, bit of a clunk at the end.
Here it is then, the first time properly and then the second time with a handy cheat bringing first one leg and then the other up onto the forearms.