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Ah, the other lunatic has outed himself!! Brave man.
On the collimation question. Yes.
Have a look at the attached images. I have pirated a focuser off another scope for illustration purposes. In the pics you'll see it attached to the flange and the flange sitting in place on the back of the primary cell.
What the pics don't show - because I have yet to drill the necessary holes and get hold of the necessary springs and bolts, is the push/pull antagonistic adjustment screws that will allow the focuser/baffle tube to be moved independently of the primary. And in these images, you'll also see that the oprimary cell also has good independent collimation screws in place. So we will have collimation both ways.
The design using these bits does away with the need for the vertical bar that the Lazzarotti has at the back. This only requires a short section of OTA tube (which I have) so the primary cell can be mounted in it. And then, that will have to be attached firmly to a couple of saddles (profile to suit the tube diameter).
The same goes for the secondary. I have a good spider and mirror holder. It, too, only needs a short section of OTA tube to hold it (and I have enough) and the same saddles to attach it to the main structural member.
I haven't thought too much about mounts yet. My idea was to take one of my exising scopes off and use that mount to get this design nailed and run some test images. I have both a Titan and an EQ8 - either of which can hold 45-50 kgs so in the short term, it isn't an issue.
I think that at this FL, we'll need at least an RA drive so an equatorial would probably work better. IMHO.
Peter
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