Anything and everything Spitfire.

Currently having a single carb setup on my MkIV, I don't have an awful lot to go on as reference for the various fuel/coolant hoses, cable attachments etc, so I'm trying to work out everything I need to convert to twin HS4s from various catalogues and manuals.

The bit on the right of the picture below where the cable goes into the mounting bracket is presumably some sort of screw adjuster - what exactly does it do, what does it adjust, and how does it fit to the cable? Is it mainly just for holding the outer cable in place?

The bit on the left which attaches to the end of the inner cable - This doesn't seem to appear in any of the catalogues... does it come as part of the cable, or as part of the mounting bracket?

There also appears to be a lower throttle return spring, with a few different springs/mounting brackets listed - different parts for 1300/1500/waxstats? Where abouts would the lower end mount? I guess it doesn't really matter massively, provided it's secure and under the right sort of tension.

Cheers