Stuck on chamber 17

Provide some pictures for crying out loud
 
ok, thanks...

basically, you want a portal to send the first ball you see into that room ahead of you. You will need to place a block on the furthest button, while standing on the other one....the way i did it was i stood on it, the ball came at me, i stepped off, then stepped on again....

Then you want to put a portal on the wall adjacent to the ball catcher thingy. (what are they called)
 
Ha, did it :)

I just call it a catcher... not sure on the official name.
 
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