Jeremiah FieldhavenReflector blocks are driving me round the bend.
I thought I'd fixed them so that they worked correctly! Instead they seem to be sending off beams to one side or the other rather than back where the beam came from!
*sigh*
There we go, working properly now. Well, mostly - I need to work out why the lighting is messing up on the lifts sometimes.
Looks like I was having some... interesting float precision issues in the calculation that determined which emitter to fire when hit by a beam. Turns out that 90/90 is 0 sometimes...
Anyway, I've now double-checked all but one of the current levels can be finished and all the objects work correctly.