Thanks for the explanation. It seems that pre-HF20 the voting power implementation had some issues where it doesn't elegantly handle powering up/down. Do you think the HF20 changes fully fix these issues and any gaming of powering up/down to extract extra voting power from a unit of STEEM Power?

If you have 13,000 steem power and you initiate a power down (13 weeks), 1,000 steem power worth of votable shares will be removed from your manabar.

Are you saying that VESTS stop contributing to one's manabar one week before they get converted to STEEM? Therefore by powering down some voting power is lost compared to if those VESTS had never been converted to STEEM?

If you then power up 100,000 steem power, you would gain rshares equivalent to 100,00 steem power.

Missing 0 in bolded number, I believe.