ahem... OP here...

I erased the EEPROM but the offset is still there..
So do I need to re-flash again after EEPROM erase?

FYI, I'am creating the .x3g code using the start/end G-codes proviced below... could this be adding an unwanted offset?
http://www.3duniverse.org/2014/01/05...forge-creator/

I think these sctipts are for flashforge and they seem to add some good steps... but perhaps they are not useable on CTC beds (or need some editing perhaps)?

And I'm using Slic3r post-processing script to trigger GPX converter.

Thanks

Ray