What a long weekend, drive up to Anglesey for CSF then across to EFI parts for a few hours then back. Well that was the plan...
Anyway this is how it went. Got there and had a little chin wag over what had been done and what I wanted to look at. Chris seemed to like the idea

and he always likes to play with something slightly out of the box.
Car strapped on and gearbox flashed to remove the limits. Then ran as is to see how it behaved and what it needed. Touched in at 260ish, car was throwing its toys out a little as boost was coming on way faster than it thought it needed so was backing things off. Its a good thing to have in this case as the turbo was trying to come on strong 1500rpm sooner than the hybrid.
Chris started doing his thing and we very quickly got around 280, the hpfp that I had "modified" was giving some odd readings and it was looking like we were blowing the spark out. I Un-modified the hpfp and ran with the Megane fuel actuator and all was good again bar the spark issue. Decided we would whip the plugs out and gap them differently and this is when disaster happened. One ended up on the floor 😭 , on first inspection it looked ok, but once they were gapped a little closer and put back in it was very apparent there was an issue. When removed again we saw the arcing marks..... now the plugs in these are seemingly an odd or new style, and finding a set or even one at a local factors was proving difficult. After some worrying calls a set was found 35/40min away, luckily a friend of Chris's went there for me and got them

ex RTOC/R5 GTT guy called Kev
So, Chris had other customers lined up, and I didn't need to rush home, and I had no spark plug so I was happy to wait till they were done to get back on at the end of the day.
@Clarkey had his awesome r5 there for a tweak and a 172 track toy was also in. No issue for me as said and then it allowed Chris to have a play without any time constraints.
Plenty of runs and testing done and we wrapped up with similar top end/peak power but gained an absolute shed load of bottom end power and response 😁 car feels like a completely different animal again. I didn't think it was overly laggy before but now its a full on riot to drive. Bags of fuel in reserve, the stock Clio hpfp requests something near 150bar of pressure, the meg one asks for 200bar and can go further. I think Chris requested 175bar of fuel pressure and dialled back the injectors a little. But I'm assured there is a fair chunk left in the bag, this is what I was looking for as it sets me up for the future if/when I push some more.
The meg 280 turbo isn't going to give me more top end, so a slightly bigger comp wheel maybe the next thing to do, but for now ill enjoy it.
In short if you want a genuine 300BHP turbo upgrade on a Clio 4 RS, id be looking at the meg turbo conversion, all the gains of the available bolt on hybrids with none of the losses.