machinery problems

Im at the severed hand part and i cant seem to find all 4 parts.
I have kaylessa's machinery part
one from solonar tower
and one from the war rooms
(i have no idea which sections these items were from cause it was at the end when i realized i didnt have enough parts)

where can i find the last missing part i need? what location is it in? Is it in one of the exits in that big circle area with 4 exits on side?

if you can help it would be greatly appreciated.
vip

[Felix]

(SPOILER)




The four pieces are:

one in each of the three towers...

...and one on the first level, in the darkness on the right side
you can't reach by walking directly from the entrance.

The last one is the hardest to get, because


(MORE SPOILER)


elven elevators are NOT obvious. They look kinda
like easter baskets you can walk on.

Felix

can you plz explain furter? its just not clicking in my head.

[Erekose]

to find the last piece you have to walk over the cage like part i think on lvl 3. When you pass over it you get the symbol for passage to another area. Good luck.