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ost_uid0][quote

ost_uid0]That's exactly why you could see your future self, as long as it doesn't influence you going back.[/quote

ost_uid0]
Changes in the timeline occur only the moment when you travel through it, using the consequences of that travel. The moment you travel 75 years to the future, the timeline records you suddenly dissapeared and suddenly reappeared 75 years later (the same physical age as when you left, of course). You've been missing the entire time inbetween.
Then, when you travel back to your own time, lets say to ten minutes from the moment you left, the timeline is changed once again. It now records you disappeared, then ten minutes later reappeared.
I think...
[quote

ost_uid0]Sounds like Michiel is arguing the need for some kind of "temporal mass-parity coefficient" in the equation. (Kind of like the cosmological constant.)[/quote

ost_uid0]
In English please.

(Or, preferably in Dutch) Are you refering to the whole mass-post waaaay back there?

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ost_uid0]