Plenty of info on here already
see page 9 post # 88 here - make sure the prt is assembled as in the schematic, take off the old pipes and offer up the new as in the diagram, you will soon see where it fits.
As Freelaner says don't forget to take out the old thermostat from the casing at the back of the engine - I took off the inlet manifold to get better access to it
I've used that mod for ages. In fact I've just drilled the new stat on my VVC MGF. It's not as good as the PRT but it works. I only drill one 2.5mm hole located at the top when fitted. This won't upset the bypass flow, thus keeping the warm up time quick.
Thank you all for the advice. I bought the LR Kit - like I said, it remind me of a 1950s surgical appliance to address rectal dysfunction! And I may need one when I get to check out the VCU!
Gubbins removed from an old thermostat and it and the housing are awaiting to be refitted. I have most of the parts to hand now, just waiting on the oil pump O/H kit from Rimmers.
Those door light arrived yesterday from Hong Kong, nicely packed to. I love the text on the box the came in. Remind me of a sign I saw recently - Genuine Chinese Broccorri