We have had countless numbers of XY turbo's, and other Ebay turbo's that are all popping up that have big manufacturing problems.
Pitting in the shaft, Poor castings so bad that they break off from the cartridge, Some dont seem to have even been balanced, Compressor wheels that have enough meat cut out of the back you can fit your pinky finger in them just to that they are close to being balanced, Compressor wheels that have dissapeared into the intercooler and STEEL turbines that have been sheered off and ended up burried in the cat.
Manwhore mentioned differences with highflows.
We use 2 Heinz VSR's to balance all of our items.
First the compressor wheel and turbine wheel are balanced in the first unit and the second unit is for balancing cartridge assemblies.
All of our highflows are machined to the exact specification of the previous without fail.
Laser depth guages are very good peices of equipment.
The failure results of ebay turbo's are amazing, some of the pictures are very impressive.