Just a little update ('cos I'm feeling proud with myself at the moment! ).
The turbos are all on now and everything torqued up underneath; the fmic is fitted too. I even took the manifold off and copper-greased every nut and bolt when I replaced them, so that going single in the new year won't entail quite as much grunting and swearing for the guys over at Turbofit All new gaskets etc. thanks to the ebay head kit I've had lying round for a year or so!
Just got to move the PAS cooler now, then remove the inlet manifold and throttle body (to replace with GeodieSteve's polished ones ), refit the bumper and headlights, fit the new brake discs, calipers and pads, fit the boost controller and decat, and FINALLY she'll be back on the road