Plants are looking nice so far.
A couple of tips on your hydro system:
1) You should use as much of the 2 liter bottle as possible. That is, just cut off the bottom so your roots have as much room as possible when the plants get big.
2) Line the bottles with 1 gallon grow bags (the ones with holes already punched) and put your growing medium inside the bags. That will help keep the roots from clogging up the pipes. If the roots grow out of the holes in the grow bags, pull it out and slide the first grow bag into a second bag and drop it back into the inverted bottles.
Hope that makes sense. I got those tips from a friend at another site.