OK so the MK1 and MK2 TT lower control arms are clearly not interchangeable due to the different inner rear bush setup.

What about the spindles and/or ball joints? MK2 TT spindles appear to be alloy and the ball joint carrier is slotted for camber adjustment. Definitely a better option than the MK1s if they work.

Would MK2 TT spindles work with MK4 Golf LCAs, tie rod ends and shocks with the middle hole re-drilled just like what is necessary to fit the MK1 TT ball joint carrier?