Yeah, that's why I rated it "expert". Here is my solution, quite a bit higher budget but by the time I got a solve I had decided to make the budget rather forgiving: http://gallery.drycactus.com/image/view/54631

Although I managed to get it significantly under budget, I do feel it deserves a 5/5, if only because it's pretty fiddly to build even once you've come up with a concept to solve it. http://gallery.drycactus.com/image/popup?id=55029

I originally set out to make this map as a "Hard" map but felt it might be too difficult and might fit more inline with my "Expert" maps. How hard did you guys find this level?