Couple of quick notes, kudos for the great idea and slick interface, btw :D
You can't Build Complex with existing stations - not sure if that's mentioned anywhere, but you have to found a new station after the mod is installed in order to get the Build Complex menu item.
And I can't buy/sell to the complex - it's happily whirring away producing items with the stock I already had in the original stations, but buy/sell appears to do nothing. Any ideas?
Niggly detail - in the original stations, I can put 9999 into the qty box and it auto corrects to the max available. I'm lazy :P Your interface appears not to do that...unless that's related to the above problem.
Thanks for your work!