Great project
nice to see a modern Renault turbo being pushed.
I notice that someone has already mentioned this above but do you really need forged internal parts?
If you are running 1.25 bar currently with a less than ideal map and it's holding toghether then with a good map why would it not be relaible then?
Assuming you have given it a good beating on occasion? If your happy with the current power or would like maybe just a little more then you would be better off spending the cash on
VNT
Standalone ECU
Mapping
Clutch
This is only my opinion and I'm not trying to discourage you at all
Plenty of people have ran relativly reliable power with standard internals on f7p/ lumps and even took the tops of the pistons down to lower the c/r. Unless the pistons are made of chocolate then I can't see why it shouldn't be the same for your lump.
Shame you can't pull another engine apart to have a good look at it, mind you, if the market is there then the likes of E/D and k-Tec will more than likly be doing it soon enough.