Very cool idea and that stick looked so slick powdercoated! Keep up the good work. 
Good to see this is still coming along!
Thanks guys!

welcome back! I was hoping to see the finished product, been following since the beginning!
Thanks mate! The beginning feels like an eternity ago. Here's hoping the end is now closer than the beginning.
Awesome build, truly unique.
One thing I am concerned about though is the fit of the PC components
inside the CP box... esp now because it sounds like you're making it smaller?
I know you said you measured, but I haven't seen any photos w/ components
in -place as a test-fit.
Great ideas here though -- inspiring
Cheers. My measurements say a mATX motherboard should JUST squeeze in width wise. My main concern is the height of the PC components with the joysticks, buttons etc. mounted on the CP. I plan to build everything else first & then build a PC within my space limits. There are plenty of pretty nifty HTPC & mini ITX systems around these days that aren't too expensive so I should be OK in finding bits small enough to fit into the confined space.
From shopnotes a long while back:
Regarding the MDF - If you dont want the joinery to show everything has to be mitered. Ply wont be any better if its not mitered. You are having trouble sealing the edges because MDF has a dense layer on the outsides and less dense material in the center. If you want a consistent density try something called Ranger board - Looks just like MDF but dense all the way through. More expensive but well worth it - It would still poke through the primer though if its not mitered.
Still protect yourself from the dust - It will kill you !!!!
Build looks really good though - Even if you covered the CP with something the seams would still show through eventually - even if you sanded it perfectly smooth. If the wood moves at all due to any moisture change (and it will if you don't have humidity control in your house) it will never look seamless.
Every time I looked at this I always thought you wanted it to look like that and did that on purpose - Personally I like it and will pretend you meant it to be that way. The exposed joints will make everything look like its boxed off - I like it!
EDIT - I just went and looked more and read what you wrote last and you are crazy to beat yourself up about any of this project - It looks awesome. You might have visioned sleek - and thats what it is. Sleek. I want one!
Thanks guys! All great advice.
Since I spotted the joins coming through, I've spent hours on the net reading up on the best ways to finish MDF. Most are pretty similar in explaining sealing techniques (bondo, drywall compound etc.) and most also conclude that there will be movement regardless of what you do. It's just the nature of the material. I think half my problem was I initially used a water & PVA glue mix to seal the edges many months ago. (Great advice from the man at the hardware store

) Although a pretty common way people seem to seal MDF, water is MDF's natural born enemy & will make the ends of the wood swell.
Anyway, my initial plan was to use a wrinkle/textured type of matte paint as they are normally pretty hard wearing & it will match the texture of the powder coat on the frame. After my joint dramas, this type of paint should (hopefully) also help in hiding any small movements in the MDF due to moisture.
Here's a few pics of how I'm modifying the base.
The existing base marked with where I want to cut. Rapt that my bondo work covering up my terrible routing skills is also being cut out.


The shape of the old base.

Cut & new side trim attached.


The new shape. Fits in better with the monitor & marquee box I think as now they're all the same width and it's more rectangular in shape. Not really sure what the shape of the old base was all about. Just a random hexagonal shape I pulled out of my butt I think.

Cheers.