The communication with the seller is very easy, but the information we got is very poor.
We had ordered our machine, but for weeks no clue if it would be delivered.
Now the machine is delivered it appears that the spindle doesn't work. Very annoying extra problem is that Walter Kung suddenly doesn't respond to any email or skype messages anymore and appears to be never online on skype anymore as well.
Reading all the problems on this forum my advise is to think very carefully before buying a machine here.