My 2penniesworth I wouldnt buy another Lathe from Chester unless they were the last lathe manufacturer on the planet, and even then with some trepidation. Everyone has their own opinion and experience, so you have to make your own mind up from the good and bad, but I was very disappointed 5 years ago.
I bought a DB10G (predecessor to the DB11), it arrived promptly, was unpacked and set up, and then I found the following.
The saddle wouldnt get closer than 6 to the chuck before binding up it was loose at the tailstock end.
It was advertised and sold to me as having a leadscrew reverse which it didnt.
It had horrendous vibration except at the lowest (125rpm speed).
The tailstock would not move more than 1/3rd of the way up the bed due to huge casting lumps on the inside of the bed.
I spoke to Garry Rimmer at Chester who was very helpful and agreed to take this one back and send another one out. This arrived 1 week later.
On the second one, which was obviously made in a different factory as all the castings and the handles and the headstock charts were different. I found this:
Still no leadscrew reverse.
More than half the change gears missing (same as the first one actually), so no chance of any screwcutting. Also have a look at the screwcutting chart picture below, and you try and work it out.
No graduated dials or reference points on leadscrew/cross-slide
Major slop in longitudinal feed handle which would need re-bushing, and it constantly popped out of mesh when trying to manually traverse.
Huge amounts of casting sand still on everything the picture of the faceplate below that came with the Lathe is a perfect example of the quality/lack of it.
I rejected this one back as well, and asked for my money back as they now explained that the marketing details with the leadscrew reverse actually referred to the Optimum lathe sold in Germany, and not the DB10G.
Had a lot of hassle getting money back and the Lathe picked up, but got there eventually.
My advice would be to talk to Warco instead.
Peter