To start with, "Hello"!! I am about as much of a newbie as you can get

I went to a friend’s house about a week ago that had a cabinet (he bought it already assembled so he can’t help much) and I have been reading obsessively it ever since trying to figure out how to build my own four player panel. It is a bit overwhelming but I have really tried to pour through as much information as I can…..
Right now I am concentrating on building just the four player control panel. I am planning on putting a small form factor PC into the bottom of the control panel to make my control panel portable (I am an I.T. guy so this part does not intimidate me much). Later I am likely to buy an old cabinet, fix it up, and slide my control panel in (after doing some significant woodwork, obviously) but initially I am just going to concentrate on the control panel and I will make it fit later to a cabinet.
In general I am just open to any and all thoughts, recommendations, ideas, etc. based on what I THINK I know
So far, here is what I have come up with:I am planning on using MDO instead of MDF for the wood in my control panel
I am planning on my MDO being 5/8” thick
Update: Holy cow 5/8" MDO is hard to find!I am planning on using plexiglass instead of Lexan
I am planning on my plexiglass being 1/8” thick
I am buying a forstner 1 1/8” bit for drilling (especially for the plexiglass)
I am planning on using a drill press at high speed but moving very slowly, using my forstner bit to drill the holes in my plexiglass and MDO
I am planning on buying some scrap pieces to test the drilling out first
I have purchased 4 “Mag-Stik Plus” joysticks from Ultimarc (to allow for 4-way and 8-way adjustment)
I have purchased an I-Pac 4 controller
I have purchased a wiring kit from Ultimarc
I have purchased one U-TRAK FlushMount Arcade Trackbal (and bezel)
I have purchased one Opti-PAC Interface with USB Cable
I have purchased several colors of Competition Pushbuttons (6 buttons each player, 1-4 player buttons, 6 admin buttons, and 4 coin buttons)
I am aware that player’s 3 and 4 probably don’t need 6 buttons but I am a bit OCD and like them all to match

I know that 6 admin buttons is kind of a crazy amount and am open to less but I read somewhere that (Enter, Pause, Left Mouse, Right Mouse, F2, and Escape might be worth considering)
I have decided not to do spinners or a flight stick at this time
I moved the trackball down some to give me room to really get after some Golden Tee without hitting any Admin buttons (if I decide to keep them)
Attached is my first rendition of my control panel layout.....again, any and all thoughts welcomed and appreciated!
Thanks for all of the wonderful information on this board! I hope to become a contributing member as I learn the ropes a bit more