On 28/05/17 09:17, DerbyBorn wrote:


The cord will want to to take the shortest path when pulled. Can you
consider those "pulling Rods" attached to the first runners?

Oh just put a bit of OO gauge track up there and a model train engine
and make a feature of the whole thing using the locomotive to draw the
curtains


--
There is something fascinating about science. One gets such wholesale
returns of conjecture out of such a trifling investment of fact.

Mark Twain