Many thanks for organising this Stefan and Committee, - a very useful and interesting evening.
A couple of items from me that might be relevant,
The rear wheels I am using are ANF 125 clones, from Thailand I think, whether they are any good or not remains to be seen, but we'll find out at the first corner.
Bearings required were 37 x 25mm and proved a bit of a trial to source, I seem to recall, but otherwise they seem o.k.
https://www.ebay.co.uk/itm/115421011720?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=oKsplXggSZy&sssrc=2349624&ssuid=n3Xl8mAaSmy&var=&widget_ver=artemis&media=COPYFronts were from the same supplier 32x17mm bearings if I recall correctly,
https://www.ebay.co.uk/itm/115492114322?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=oKsplXggSZy&sssrc=2349624&ssuid=n3Xl8mAaSmy&var=&widget_ver=artemis&media=COPYAround £50 per corner
With regards to the chassis discussion, while I am sure I could have learnt to weld, there are a couple of reasons I might have been interested in a ready built chassis. Firstly I don't really have the time to start embarking on learning a new skill and buying kit that I might only use once. Then there's the cost of a new welder, mask, goggles, gas, etc. never mind where to put it.
And finally there's the small matter of risking my neck in a set up I had welded!
In the end, I went down a different route, but from a speed of build, and cost point of view, it would have made good sense had it been available.
I did need some welding, but as Stefan pointed out, there are small fabricators who can help. I had aluminium axle ends TIG welded, a steel front beam axle and steering column welded, and plates laser cut for rear wheel adaptors for around £150, so it's relatively inexpensive.
Thanks again for a great evening, and a useful way for all the lone builders to exchange information and ideas, definitely one for a regular spot in the calendar.
Peter