Ok mate you have some flaws in your second design, but don't worry because im here to help.

the first thing i noticed is that the contraption in question expells water when you flip the coke bottle over. Which will waste good water and will make a mess.

But the big issue here is that you cant light the weed, turn everything over, and release the water all at the same time.. you would need a second person.

so as you can see in my illustrations i fixed these conundrums

http://img.photobucket.com/albums/v1...ICANMAKETO.jpg

now makeing the remote is gonna be tough... your gonna need 2 AA batteries for sure.. and just start from there.

the boomers are not needed, but the yummy frute snack is.

glad to help. (this is not just the drugs talking)