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As I said the historic bug has got me and it was a style developed about 1845. The main advantage was that the observer could stay on the ground and even be seated almost irregardlless of the size of his or her scope.
I would certainly go with a truss tube set up for the modern advantages of weight reduction etcetera. But I am looking for a long focal length. Sir John Herschel's 18" reflector was 20 feet long.
We all have our particular twists and one of mine is that the observing done from about 1750 to 1850 has a hold on me so if I can get the equipment, at an affordable price, that will allow me to replicate that time period I will be a happy camper.
Brian
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