Well it's done and working, Saturday night when I got out to the shop I started right in, first up was to drill the 2 2 inch holes one for the connecter for the shop vac and the other for a 2" soffit vent for incoming air, gave it a nice finished look.
Once I had those drilled I switched to a 1" hole saw and drilled the hole for the input hose grommet. Then I installed the 3 new fittings and fed the hose whip into the cabinet and connected it to the gun.
Video link click the pic.
I didn't have a whole lot of time last week so I and using media from Menards.
The hopper could have steeper sides to allow the media to fall to the bottom easier and when I have time I will have to make the hand holes bigger, it works but it's a little tight.
Things that I like a lot are the light and the large space, but the best part is the switched outlet, turn on one switch and you get the light and the vac.
The set up seems to be working well, after running for 20+ minutes there is no dust in the air, none of the seams are leaking media.
All in all I am happy with it, for less than $100 I have a 23x48 cabinet.
1 1/2" angle left overs from other projects
sheet metal free from a friend
rivets some I had others clearance from HD
Light 7.99 Menards
Plex for light 24.99 menards
castors reperposed free
ply for shelf left overs from other project
window glass scrap/on hand
vac fitting 9.99
door hinge reused
media gun bought long ago and never used
hose whip 4.99 HF
Everything else was laying around the shop.