I'd recommend replacing the following parts in the diagram in the above post:
18, 17, 14, 25, 16, 11, 13 (maybe no.4)
And parts 11, 13, 16 in
this diagramThese are all awkward/impossible to get to without removing the TB, TB heating plate, and upper inlet manifold so you might as well replace them all once you've got it apart.
I've had mine apart this afternoon to replace no.25. Putting it back together really is a pain in the arse - especially the two half-inch hoses which fit onto the bottom of the TB and heater plate. You have very little room to work, and the hoses are hard to grab and push onto the pipes. There was a lot of swearing.