faulksy

hopefully shaun, but only need to see 3 dso,s m27,m57 and m13 happy with them

mirror edge support bearings were fun to drill and tap, just need to make spacers now so they rest at the cog

im a maintenance fitter olly so part of my job realy. i will polish all the welds up today and put another pic up

absolutely richard, wouldnt be with out it . love it

ground board with acetal feet next baffle tube, again top manufacturers are using a ali ring instead of plastic, so i have done the same. 1.2mm sheet and powder coated black this will be flocked next up the fabulos mr jennas handy work, amazing what you can do with a axe . mirror box next what do i use to connect the truss tubes to the rest. in come webster lower clamps upper tube clamps are by aurora couldnt re sist these next up focuser board and finder board, these will be drilled to suit my ft focuser and holes of 40mm bored into them to make them lighter. these then will be sent away along with everything else made in aluminum to be anodised and then finally for tonight my new red dot finder. i dont need anything else as i use the nexus digital setting circles

next up, what spider and holder, used google and it seems all the top dob makers are using the astro systems spider and holder so heres mine, custom made to my size next alt bearings, wanted webster but 400 us plus pp and after steves going around the world i thought ill make my own. the 40mm wide and 30" diameter un painted then powder coated black next up ground board this 70mm x 10mm ali

next up mirror cell welded with milled cut outs for wobble bars, this was quite hard to mill as its stainless steel next up wobble bars which i milled in work with support triangle and bearing in place for trial fit next up sub frame to support mirror cell, and drop down tail gate design

hi everyone, thought now was a good time to put this build up on here, lots and lots of thanks to the great steve jenner for his wood working skills and a big thanks to damien mapster for emailing and helping me through plop for my mirror cell . as you know, my self and the dob mob go to all kinds of dark skies as often as we can, and after seeing steve and calvs big dobs and dans medium sized dob i thought it was time to build my own or purchase a ready built frame. prices are very steep for complete built scopes and then add on import duties and shipping and your looking at around 12k for a 20" dob. so a good start the best or close to best 20" f4 mirror and secondary was ordered from no other than orion optics uk, after owning the 14" with 1/10 mirrors i thought i would do the same with 20" so 1 set of ultra grade mirrors were ordered around 10 weeks delivery which now is only around 1 week away. next up mirror cell, priced a few top draw items and they were coming in for a round 1 - 1.2k and 6 weeks delivery. so i thought no ill make my own. email to damien and he plotted the dimensions onto plop and emailed me the drawings. priced up the steel which i used hi grade stainless and 30 quid later the cell was born. alll developed pre weld stage

same as mine 0.29 is the sweet spot

that looks very very good, just picking my jaw up now

awsome thread. love it. keep it coming

hi damien , great idea about insulating the spider but it will leak through the bolt thread

it sounds like its slipping from what you say, before buying new have you thought about adjusting it, or locking it with the brake ?

nice one stu, glad you sorted the colimation dan the views were great through it

i agree with bart, pat dont mix your words realy feel for you though raanay, whats your next move, are you going to return it or keep it ?

awsome,awsome set, do you realy feel you need to group them all so closely as the fov will overlap massively. lovely collection though

very nice scope the portaball, lovely design. look foward to your first light

That's nice Helen mine is white

nothing wrong with your scope, you will have some great views with it and great memories.

i like to keep my organs close to my chest alan

god there great scopes arnt they john, cant wait for my new one

looks like, didnt mean to put that gerry