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The hex hole is correct as the bolt will go into the bottom, there is then a hex plug to seal it up and make it look pretty (ahhh). I've ordered a lof of M3 hex bolts and will try them out. Thanks Rob

Thanks for all the replies. It seems that there's no obvious and easy answer to using M3 threaded rod. I don't have a lathe, the CFO would have a fit if a lathe turned (no pun intended) up. I had thought about the hex headed bolts and dismissed them as I didn't like the idea of a cap to hide...

Hi, I'm building a number of 3d printed designs for telescopes. These are tube rings and mounting plates. Whilst I can buy M3 grub screws and knurled knobs, I would prefer to make them as then they match the design of the printed stuff, they can be printed larger so that at night they are...

I brought a right rear Skoda Octavia door as it was cheaper to buy a second hand door than to replace the broken quarter glass. Came on a pallet and I was absolutely delighted with the condition and the delivery. Zero issues, but this was the sellers job so they did it properly.

Looks great. I love the off hand way you describe highly complex details. this should be a training course for asping luthiers. rob

If you send me accurate dimensions for the adaptor, I’ll print one up for a small donation of your choice to the North West Air Ambulance. Other people on here have helped me a lot, my woodworking skills are slightly less than my brain surgery skills so I can’t help back that way, but I know...

Ah!, so you're responsible for the solid cloud cover, rain, fog and generally miserable conditions I've had for the last few weeks. I wondered who had some new kit.

Utterly wonderful. If you fancy shipping it to the UK for a while (10-20 years?), I'll give it a good test and check it all works. There is no charge for this service. After this time, I might even be able to play well enough to do this justice. Thanks rob

I play the guitar (very, very badly) and am thoroughly enjoying this thread. I will never make a guitar in my life, I'd be lucky to be able to put a shelf up, but its great to learn from other people, even if I will never use the knowledge. I would love an early Telescaster, but as with all...

I'm trying to think of a better word than superb and failing :) A wonderful thread to follow. Thanks Rob

I printed and built my own CNC from V1 Engineering. Here’s my thread documenting all my stupid mistakes I made. https://forum.v1engineering.com/t/new-build-in-clapham-north-yorkshire-uk/16519 I use a Katsu router. Works well for me. I don’t cut metal though. Rob

I brought my first flat in 1987 at the height of that boom. I sold it in 95 at the bottom of the market but brought a house at the bottom so worked out well. Sold the house for 4x what I paid for it in 2012, brought a house in Greenwich and sold that for double what we paid. I now live mortgage...

Great shots. It's £4.99 now, but keep going and you'll get the itch :0 Rob

Star gazing binos theoretically have a different set of coatings on the lenses. I'm exceptionally sceptical to the value of these coatings. I got a decent pair of normal binos (10x50's around £50) and they've been perfectly good. Your 30x80 telescope should be fine. Not sure how the eye pieces...

Get a pair of binoculars, a deck chair, a flask of something warm and a sleeping bag. Lie back and enjoy the night sky, even a £20 pair of binos wll be enough to pick out a few of the moons of Saturn and will get a hint of the rings (depending on the dark sky). However there is nothing like a...

Very nice. Barn door trackers are quick and easy to build. If you get the polar alignment right, and you've got a nice guide scope to do it, you can get great results. Also very portable. I don't have a decent 35mm camera but I sometimes think this approach is easier and far cheaper. Thanks Rob

Aperture fever should be a recognisable mental condition as it affects so many people. You start at 60mm and then think well, a 72mm is only a little more, and then 80mm is just a bit more and I get so much more light gathering, and perhaps a 90 mm might make all the difference to split that...

The ZS61 is a little jewel. I've got it and the field flattener for it, the field flattener is not a reducer so it stays at f5.9 which is OK, though I'd like a little faster, but it is what it is. I got it all for £280 off eBay a few weeks ago and took a punt. It turned out that the previous...

Spot on advice. 1. Most decent binoculars have a 1/4"-20 thread in the joint in the middle. It's normally covered by a cap and most people never know its there. You can build a decent parallelogram in a few hours with 10mm aluminium box section and some nuts. I did and I have ten thumbs. 2...

@shed9 gave a better answer than I could :) When you get to big mirrors, the weight of the tube can be a lot so an open frame is an easier and lighter option. There are some skilled builders who design their frames using CAD programs to get the most rigidity for the least weight. if you have a...