It's just a side issue: In our aikido we distinguish between moving with or from the hara and moving with or from the (lower) tanden. Is this common or don't you make this dinstinction in your exercises or waza?
how do you make the distinction between the two in your practice? Is it possible to convey in text or is it one of those IHTBF things?
For me, all exercises/waza are just interesting vehicles for practicing the same thing - that everything is initiated in the mind/centre, the body is the physical manifestation of that initiated internal movement. Of course, every part of the body must be connected to the centre. Which for the majority of those practicing aikido, it usually isn't. But that is what we should all be working towards.