I thought I was stuck with a roof thing too, not so. My soul forge consists of one anvil.
I went into customization mode, after moving a few things on the second floor....removed 12 tiles, 4x4.......commited.
Set 12 gozas, in a 4x4 position under the hole in ceiling....raised them just once to check n see if I was lined up....no, I had to move them once to the right or left, I forget.
Tried again, cool....it works.....raised them all about 4 times.
Here's a trick, because you cannot see the goza to lower it with your deco tool....I had to use UOassist, and previously made a macro to lower one certain goza mat (lower right)
Macro is easy....set to record, do it about 4 times, then in the menu, click on where it says menu selection, ( I think thats what it said) either way, add a pause, I did 1100.
Once the goza went down, I saw a section of the soulforge drop as well, then I went to choppin and left the far left anvil.
Warning.....If you do chop your forge and ever want to decorate in Customization mode.....LOCK that section of your forge down before you go into custom mode, or it WILL go poof.
I found out the hard way doing granite counter tops.