Quoted from razorsedge:Every bit counts
The path to the front was why I moved the PC to the side, so that it could be within the duct, and then also leaving the clear channel up the middle for the cable management. So now for my cabinet the air coming in the back at the bottom vents must come all the way forward to the front boards laterally, and then it can move upward once it gets to the cover piece over the Cabinet Power Board and Power supplies. This is similar in effect to the hose duct upgrade but with a duct of much larger volume and a little less resistance to flow.
My choice for where to put a fan for most usefulness was right behind the coin door pointing at the lower flipper coils. Helping to shed heat from flipper coils and that hot lower I/O board. Went through a 3 hour Flip Frenzy the other weekend without flipper fade or heat issues.
The only issue was one instance of regular play launching all of the balls onto the playfield. I reset the game, wiggled connectors on the ball trough, and it didn't happen again.
I still have to put vents in the backbox and close the vents in the back of the cabinet. That is about to happen now as well. It is time to strip it down to sort out the wobly playfield protector, a thorough clean, and apply some mods that have been waiting.
Onward!!!...