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When I was working on the ES prototype way back in 1991 (I think) at the
Lancair factory, we used an air die grinder with the thinnest 3" cutoff
blade avaiable for trimming all the windows. An additional benifit of the
cutoff wheel is that the heat created reduces the probability of cracking at
the cut. The main consideration is to NOT use anything that has a
recipricating motion.


Bill George 530-642-8063
LIV-P N49BG, 01CL (Swansboro-Pvt)
Placerville, California