Simple Control Room design

Hi guys! My first post here... I´m happy to be part of such a great forum... I´m about to start one of my dreams, my own home studio. The room shown here is my first layout (based on one of John´s models. Thanks John!) of the control room. I have to build another room next to this one to make my recording, so i would like to know wich do u think is a good legnth for it (i have to respect the 3mts side)... Anyway, here´s the design, let me know what u think... I don´t have much money, so i decide to not build windows. I will use my camera to have eyecontact while recording... And another thing... must be all absorbers as tall as the room is? I mean, from floor to ceiling? Thank a lot!

Hey Guys! Come On... Please, some feedback from someone... I would really like to know your opinion. Thanks!

It looks ok. Like you said, you're pretty much following one of John's layouts. I didn't respond when I saw it because all I had to say would be "yes, that'll work".

Thanks dymaxian! Another question... i will build the recording room next to the one shown. So it will be 2.9 mts (9.51 feet) width but i don´t know wich height would be preferred... i tried to use the ModeCalc but i´m pretty lost... I GUESS 4 mts. (13.12 feet) would be fine. Any idea? Again, feedback is appreciated.