3 point cells are available from a number of places. The problem is that with so many sizes of mirrors it becomes hard to provide more support points for the thinner mirrors. You might want to get the software MIRRORCELLCALC that`s available on the web. It will calculate the best arrangement of the points for your particular mirror and also explain by the questions that it asks about your mirror why you can`t just buy a cell for your mirror.
My best suggestion is to start measuring for the cell parts and put one together.
I am glad that you are going to use a 27 point rather than a 18 point as the balance is better with 27 point as far as using triangles throughout rather than some 2 point bars at one point.

• Software - gcdill - November 21, 2002 - 15:08 UTC