Yep, I cheaped out. I paid around 65€ for a knock off of the Oregon Jolly, and saved 200+ €
Was it worth it. Yes, considering the amount I use one. It'll pay for itself in about 10 sharpens, which could be a bad weekend when I'm working on the ground.
First the bad. Poor assembly. The earth wire was so badly crimped, I was able to re-use the crimp. Wires from the lamp weren't sheathed, so the shorting to case would have happened and a 20A/230V circuit probably wouldn't have cleared the earth fault. Sheath below the earth was simply pulled up.
2 crimps were split.
You can put a tommy bar in to lock the shaft. Unfortunately the hole was in the wrong place.
A hole has been melted into the correct place. Probably a waste of time as you can hold the disc to nip it up.
The adjacent bolt was flogged too tightly and has fractured the cover. Quite a bit of rust / chroming hasn't worked.
Discs are ok, but centre a bit tight on the shaft. 22mm centre, 145 diameter. One is 3.3mm thick, the other 4.8. For my pico chains the 3.3 fits fine. Cant get the 4.8mm in!
There is a 15W E14 (small Edison) lamp. Probably enough, but only comes on with the motor so no use for set up. I'll have to mod that. It is 25mm above the holder and the is another 25mm of free space. 20mm diameter and it'll go to 22mm.
The top plate angle has 2 scales, 1 front, 1 rear. They vary by about 2.5 degrees.
The chain clamp needs work, as it doesn't seem to clamp without a loss of force which then changes the angle. When I work this out, I'll put the solution here.
Test fitted against a brand new Stihl chain with the advised settings, the disc fitted well.
There is a really useful table in the manual with chain set up and mine is shown correctly. The parts diagram is missing the parts, but has the numbers!
Ordered in EU and came with EU plug. Oddly, came with a 2 pole travel adapter to UK plug. This would be illegal under CE marking as a product has to come with the correct plug for the country. It is also unsafe as there is no earth pin.
Great video here link starting at about 8:30. Also suggests using a CBN wheel and moving the clamp hole closer to the centre.