Are they the same problems or different ones? We have an SL10 at my 'day job'. It doesn't have a tailstock and admittedly, it does sit quite a bit, but I don't think it's had anything but PM since they bought it three years ago. They hit the power switch and it fires right up.
They ran a batch of 4130 parts just the other night: turned, faced, bored, single point threaded and had a spherical back profile they did as the parting operation (required just a little cleanup with a file--impressive). No problems with the machine.
How many 'in cut' hours do you have? I'm really curious because I could see purchasing an SL10 someday.