[Leo.G (Leo)]

That's a lovely looking focuser Stefan!
Billet aluminium, do you use a CNC milling machine?
I guess it would be a heck of a lot of work trying to do it repeatedly manually and introduce likely errors.
I have the BF20 mill I have yet to weld up a stand for and the BF30 compound table I bought and I am considering once up and running converting it to CNC. There's a lot of information on the web about doing the conversions, only time and money, I have plenty of one when I'm not too sick, the other, the lotto Gods hate me, LOL. I would have made the stand by now but I have to fold up a chip/swarf tray and didn't know how large it had to be. I have that sorted out now and the old cover from the floor to ceiling flued gas heater which used to be in the house gives me sufficient flat plate to fold and weld. It's only thin sheet but it's a good project to re-familiarise myself with the TIG welder (AC/DC 200A).


Is that an anodised finish?


I have to look into a black anodising agent for my adaptors I'm going to be machining up soon. I have read about black food dye but don't think it would give good end results.
I used to do zinc plating and anodising for a living back in the early 80s, don't remember much though and I never had to mix my own chemicals, they brought a chemist in to do that. That was back when zinc plating was done with cyanide in the primary tank and sulphuric only one to two rinse tanks away. I never skipped a rinse no matter how big a hurry I was in. Except for the dust you never swept up till you hosed it first, fumes and headaches, it wasn't a bad job.