Hi Wally, I've made a few designs of a cooling system of my own, I'm testing this idea first, I forsee a few improvements I can try.
THIS T4 install will 'look' (that bad word again) awesome, like a piece of art. Like a factory install. And all the time it takes is proportional to the time it takes to save money for parts.

A sort of 'this is how I think a Cali conversion should look. Plus it's something I've looked forward to making since the very early days of the DTM, et al. Or the VW Motoring article to be precise. Looks and nostalgia are included in the design brief. I'll have Innovates 'Sensorbox' when it comes out.
I 'think' I can make it better, by making it bigger

like many before me, I'm sure.
My own design will be the best available to me at any cost, even if I roast a motor developing it. It may have an integral IC, or a supply of cool air for an IC, either way I do not under estimate the amount of graft ahead.
@Jonas, I was also thinking GT17, this small one I have is a T2 which converges to a finger tip sized port in the turbine housing, far too small I agree. I will go with that suggestion, thanks.
Func412, your package sounds good enough to get the project started! K-jet is awesome, something else I must do in the future.. I've been offered a 2.7l flat6 with K-jet for £500

An easy weekends work for my 411

too busy finishing what I've started tho'.
Today I got the 24 hose clips for the runners, all matching and in stainless, made in Germany..perfect. I'll have to chase my hose order, it's been 2 weeks since I payed for it, Better service from CSP! VAT@16% makes a difference
Matt