One interesting thing you can try to do is, do most of your manufacturing upstairs and the item will appear upstairs. If you want the item downstairs, you just click on the stairway icon (after you have started to make it, upstairs) to go down, and you are downstairs... still manufacturing away. And the item will appear when done ... downstairs and you didn't have to "move" it yourself.
InGame Name: ==BobMan==
LEO 3 mostly.
Lvl 3X Fire
Aspiring "Tank" :))