Hi Kev,
It might be time to think about a Laminova for cooling the oil, they are very efficient and space saving. And/or a air-to-water charge cooler for your turbo. These parts are a bit costy, but very welcome when it is as crowded as in your nose cone
Laminova coolers are imported to the UK by
Think Automotive. We import them in France from them. Laminova website :
http://www.laminova.se/
PWR makes very good water-to-air charge coolers, and other kinds
http://www.pwr.com.au/products/intercoolers The factory is in Australia, but they have a company in the UK.
I am aware it is a question of cost, but if you can afford one of them, it might be a route to explore.