Yeah I looked at the inline
thermostats but I wasn't very keen on the fact they just seemed to float about in the engine bay - so I spoke to Mocal and they had the sandwich plate 'stat, which seemed to be a better option for me. You can see the extent of subframe surgery in this pic, about a 4" long section has been removed, it shouldn't compromise the integrity of the frame, and it makes the
oil filter accessible when
oil changes etc occur.

You were right Dan, the gauge doesn't need stabilisation, simple live in and feed to the sender.
And here's a pic of the chav mesh, I don't think it looks too bad....