Help with the last two secrets

[Karzyn]

I've beaten all the main levels but am stuck at the last two plasmas. I know that they're at level 8/2 and 9/5 and can see the basic paths to take. But I have no idea how to solve them. Any hints would be greatly appreciated. Thanks!

[Mills 6000]

8-2 : small hint : at the beggining, you can see a red teleporter exit on the left.

9-5 : small hint : here again, you have to play with teleporters.

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BIGGER HINT :

if a teleporter-exit is blocked, the teleporter will look for another exit.

[Karzyn]

Thanks!!! Seems so obvious now, of course.

Now to figure out this tricky ending bit...