"Brian Reay" wrote in message
...
The CD idea falls flat as, while they may be cheap, the amount of
machining
'saved' is mininmal. I suppose if you are totally strapped for cash, out
of
work and with time on your hands, they may offer some advantage, but you
end up with a 'product' of inferior quality. Engineers who are driven by
such a penny pinching approach usually end up bankrupting their company as
their products are poor.