The work carried out but Turbo Technics seems to have stood the test of time so far, it's at just over 100K on the original engine and turbo with no rebuilds to date.
No doubt that will be the kiss of death on it an it will pop tomorrow
From what I can find out they seem to change quite a bit, fuelling, machined pistons and a machined bottom end to lower compression.
Any other info appreciated, I am trying to get info from TT but nothing as yet