Thanks Philf!
Two( I think) points arise. When these worthies did their thing, there was no such thing as easily available and cheap laser stuff.
Somewhere in my laughingly called workshop are two or is it three lasers. One is a a plastic affair which is almost a baby rotary table with the ability to send a beam at an angle. I bought it to supplement my machinist's spirit level whilst aligning my lathe. OK, it somewhare with cheap surveyor's laser level etc.
So going back to CentreCam, it was in its infancy. Trethewey WAS going to bring out a new program or update it- but hasn't. Peter Rawlinson wrote a lot about lasers in ME or MEW but I forget which. However, he sort of ran into problems of getting the laser pinpoint- to be a pin point.
OK, I'm rambling a bit but another issue is that cars 30 years ago were being re-aligned after collisions with lasers going through clear plastic graticules and being turned- with prisms.
It is 30 or so years since I was being taught as a manure student by Alan Robinson who wrote the Repair of Vehicle Bodies- I had the first or second edition at Gateshead Tech. Of course, this was all part of City and Guilds qualification.
OK- can all this be modified to a cheap alignment system for --us?
Phew!
Norman