1) Most likely the mask has a rule against that kind of "rebounding"; that as soon as a Bitil is grabbed, the moments a little before and after that are now permanently off-limits. (As for how long "moments" would be, no idea, but enough that for the majority of the time Bitil would be visible to observers.) And combining this with the "put back in the same exact pose" rule, the only noticeable difference would be that new armor damage might suddenly appear every few seconds (or if the "moments" are small enough, seem to "fade to worse"). 2) In addition to Technus's post, all mask powers have rather severe limitations as long as it's a major effect (rather than very weak "always on" powers), and I'd say time travel is a WAY major effect. So I'd think a few hours at most is all they could stay. For a Toa, definitely no longer than one sleep-cycle at the very longest, regardless of the mask's energy limitations, since they would of course lose focus when they fall asleep. That wouldn't apply to Bitil, since Makuta (in their gaseous state) don't need sleep, so the energy limit would be his maximum. And to learn that we would need to hear from Greg (although I assume that bringing forward two past selves makes it drain twice as fast, etc.). 1. Well, that makes about as much since as possible with time travel, but what if Bob's in another dimension? Which timeline can he return to? Both? And do Bob's memories get altered immediately, or when he returns to his dimension or never? 2. But what if Bitil became an uber Makuta like the one in The Kingdom by absorbing all other Makuta and maybe even the antidermis pool? Edit: Also, could you steal the mask, weapons, armor, etc. from past Bitl and/or give him new stuff?