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I can't make my mind up on those lowrider designs around the net .
The lower focuser height does seem to come with a fair bit of baggage
always thought the angle could be a little tough on the neck and shoulders. I wasn't aware you also had to increase the secondary size/shape and baffle the focuser to ?
Looking at (sdm 10 ) .. and throwing a pair of decent stillettos on Peter the zenith height dosn't look to bad , trim a little more back in the build and you could probably live with it and a very small two step ladder.
But is that what you wan't ?... custom built scopes are a big investment .. there was a very nice 18 ' f4 at astrofest this year
and there are some very nice sub f4 scopes of larger apperture kicking around which seem to be ground based for visual observing .
If thats really important to you I'd try and have a chat with the owners of around the 18/20 " apperture and gauge there thoughts .
good luck.
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