oh right, i thought you had this problem earlier today.. ok mate. you said that the turbo don't seem to be losin oil. if it was then this would explain the smoke when ya turbo aint plumbed in, just by oil left in the hot exhaust system etc when it spewed it out, but if it aint doing that then I would stick a thread up asking if theres anyone near where ya live that can come and have a look. seen a few threads like this recently. I must admit its hard to diagnose by this rather than seeing it in person.. good luck though mate