I have begun a new project, a 20 inch lightweight (superlight?) Dobsonian. I am hoping that it will weigh in at around 27kg (60lb) with the finderscope/counterweight tipping the scales at 2.5kg (5.5lb). The main mirror is f5 and was ground by Mark Suchting. These are so good I have 3 of them, a 10", a 12" and now a 20".
As I complete more bits and pieces I will add them to this page. The telescope design is based on several I have found on the web and from local atm guru Alan who kindly donated the topring and groundboard design along with hours of machining in his workshop. The rocker and mirrorbox are a copy of Joe Rotman's "The Week Scope"(modified as I have a blooming big hole in the middle of it). The primary cell is David Kriege's design. The spider I found on Alan Scott's "Deep Space 4" and the secondary holder is Novak by design.

Ok, I've finished it off finally. A small mod to the flex ring to keep the dust and dirt out of the azimuth and some baffles. 3 in all a focuser, secondary and primary baffle will be added. I changed to round poles and added Ron's knobs and split blocks. All up weight without the 6 inch on its back is 42kg or 92.5lb, a little over the original 60lb I was thinking of. That was probably a bit of pie in the sky stuff anyhow. The final individual sub-sections weigh up at: Mirror-18kg; Mirrorbox and primary cell-12.8kg; Secondary mirrror, ring and focuser-2.4kg; Poles-5.4kg; Ground ring and flex rocker-3.4kg

I will post a pic or 2 in a fortnight when it is out again. Official sort of first light was last new moon. It went together very easily and will be a 15 minute put up and 15 minute tear down sort of telescope, 10 if you jogged, probably. It fits easily into my brother's 121 Mazda including a ladder with nothing on the roof, (I'll even post a pic of that). To cap it all off I'm real pleased how it turned out even if it took a bit longer to finish.

Next some binos!!!