Hey Onyan,
I'm glad you like the booth and thanks for the compliments. Here is a rough parts list along with a little commentary of things I would have done differently.
First I bought a good blower. Mine is a Dayton from Grainger. From all of the threads I read before I made it, it seemed to be what most used.
Then I needed solid table. I just made one that was the size I wanted. It ended up being cheaper than buying one. You can buy the folding banquet table legs at most home improvement stores.
After all that was done, I needed to design what the booth was going to be constructed out of. I decided to do a wooden frame lined with sheet steel that you can get anywhere they sell duct work. The whole booth is lined with that with the exception of the plenum, which has the frame walls filled in with plywood on the front and back. Then the ply is covered with the steel on the inside of the booth. Behind the filter you see in the picks, the steel is cut out in a rectangle and there is plywood with a bunch of holes. This is the entrance into the plenum and seems to break the air up nicely. From what I have been able to tell, the distribution of air is consistent throughout the booth.
I left a space in the top of the booth for a light. Rectangle is lined with angled aluminum like a picture frame and plexiglass sits down in it to shield the light. The light is a standard 24 inch from home depot. Also, the recession the light sits in is also lined with metal for reflection around the booth.
The last few things are the ducts and plexi cover. The plexi cover can really be any sized sheet that will fit. I chose to go with 6 inch duct so the blower could perform a little better than with 4. It is attached to the wood with started flanges.
The blower is attached with 5 bolts and there is a piece of rubber in between it and the wood. I just used a piece of rubber flashing that roofers put around ventilation pipes. All of this stuff I just bought at the hardware store with the exception of the blower.
Anyhow, what I would have done differently and what I'm glad I did the way I did...
I shouldn't have spend so much time and effort shoring up the mount for the blower. In my head I thought it was going to be this big, loud thing that jerked the table around. Honestly though, I can't even tell when it is on except for the air it is moving. The blower is quieter than my Iwata compressor and doesn't vibrate at all. Much of the overkill in the booth was in preparation for that, but in the end, I shouldn't have worried about it at all.
I think that goes for about everything in the booth. Maybe I spent too much time building it TOO sturdy. Seriously, I think it the most structuarally sound thing in my apartment... Including my apartment. These are my only regrets.
On the other hand, I'm glad I built it big. I like to work on a lot of big projects and never wanted to run out of room and with this I shouldn't. Also, a good thing about mounting the blower. I removed the motor and the fan and just worked with the housing most of the time. When I was drilling the mounts, I clamped everything together and drilled through it all at the same time. This made everything line up perfectly. I would recommend that for sure.
The blower was also really easy to wire up. I just bought a cord, plug and a line switch and it took about 30 mins to wire everything up.
One of the things that I love about you guys is that you like to build. There is a real DIY attitude in the modeling community and I think that is such an awesome personality attribute. I'm glad you like the booth and can't wait to see yours when it's done.
Feel free to email me if you have any questions about any of this stuff or if you would like me to post detail pics of the construction. If any of y'all are ever in Chicago, you can come always stop by.
Anyhow, thanks again for all of the compliments and help along the way.
Oh, before I forget Onyan, here is a good tutorial about booths: http://www.briansmodelcars.com/tutorials/tutorial.asp?TutorialID=23&CurPage=1
~ Regards
~ Garth