any blocks setup before the forcefield went up stay there unless you have the cutter and they allow things to flow through them
it does not block buildcraft or electric wires... however how it does this is to ignore that block.. which is still a window into the area ....
but i still can't figure a way to have it allow a person it but not others or require a key to get into !
I did find a flaw.. the mining laser .. when set to explosive allows the explosion into the forcefield area and it will knock redstone off if the emiter is close by!
I found out that the fields will not protect a player.. so nukes will still kill when they are within 1-2 blocks of the field!
I am curious on a few things
1. why not have the emitters directly powered and turned on by redstone?
2. why have it remote.. it does not feel right to have all this "wireless" since you still have to give a redstone signal to turn it on.... ( remote control would be awesome for this if it was kept wireless)