Lutz Jumbo owner here. What a piece of junk. I wouldn't pay more than £1.60 for it. Hang on...I DID pay £1.60 for it!!
The rise and fall was a complete mess. The handle/shaft/bush/mechanism in general were all mangled beyond repair. In fact they were all previous repairs that had subsequently failed. I had no luck with spares so made my own. What I have now is adequate... but only just. Fully lowered, the blade was still approx 15mm above the table, which was no use to me as I wanted it integrated into my workbench. A bit of filing had that sorted. The 350mm blade allows 100mm+ height of cut... yeah right!! The motor overheats and cut's out the NVR switch after less than 3mins of ripping with a 28 tooth Freud Pro at 75mm. There is no mitre slot as it's a contractors saw with a 16 guage table. I now have a false plywood table with a routed mitre slot and only use it for up to 50mm. Combined with a sled and a sharp blade it does now give a very clean and accurate cut and serves me very well, BUT, in it's original form..... a piece of junk.
I do all my ripping (up to 80mm) on a modified old Clark 250mm table saw powered by an old 2000W angle grinder. It really is a ferocious beast and cost me nothing to make. Obviously neither of my saws compare with quality gear but will have to do for me.
Roy