Thanks again for all the comments lads.
What I done when I got to where you are now is bolt the diff and everything back put the wheels on drop it back on the floor jump on it a bit lol to get it where u want it measure center nut to center nut to see if it's all lined up tac it up then take the running gear back off to fully weld it up
Cheers for the tips danny, hopefully this weekend i'm gonna take your advice and get the s3 back siting nice, give it a tack up then fit the diff & back wheels measure up axle to axle then fully weld it up once im happy....
Hopefully when i get back from work this week i will have my parcel i ordered up from ebay seller wayside adhesives.
I have ordered etching primer to cover up the bare steel, brushable seam sealer for the joints, and loads of textured rubberised stone chip gaurds / undersealer for the wheelarches and floor. Also ordered a couple of tins of sprayable cavity wax to spray into all the hidden parts of the chassis once i've finished welding to try and protect it from rust as the OEM stuff melted out during the cutting / welding.
Turbo wise i have been emailing everybody under the sun lately for prices on HTA3076's and GTX3076's, pricey with the two external Tial MVS's.
I've been toying with the Borg Warner EFR's there suppose to be very good, fast spool with really good flow rates, they also come with the option of Twin scroll T4 housings with built in wastegates - so although the turbo's are expensive they save money on 2 WG's and make a neater / easier install.
So i've got a good price for a EFR7670 - there is a bit of a waiting list on them but it'll be okay as i've got loads of work still to do to the shell.
The EFR7670 is rated as a 375 to 600bhp turbo able to flow 64lb/min probably a bit over the top but why not eh ???
here's a couple of piccys i borrowed off tinternet -
Price wise its a good bit cheaper than a GTX / HTA turbo if you add on the Wastegates etc.
So just finalising price with supplier then i'm gonna order it.
May aswell be first 4x4 Leon conversion in the U.K with the first EFR turbo too....