OK, been buried in the office doing "real" work for the last couple of days and then had to do a transmission oil change on a mates E32 so not had much chance to do anything to Gunther till today.
Anyway, started tidying up the seams on the lower sill and front/rear wing panels ready to offer up the new outer sill I picked up from VW Heritage - was the more expensive one they do - think its a Klokkerholm - and looks reasonably well made and decent gauge steel. (gonna experiment a bit with panels to see which ones seem to be the most consistent)
Unpicked the remnants of the floor-to-sill "filler panel" from where they meet with the wing panels, quite a complicated junction, looks like this:
Plan is to shape the fill panel I make up to replicate this so it fits neatly round this "pillar". What it does mean is that I will have to think carefully about the order of fit - if I do the floor panels first and weld them in place I will block access to the outer sill, If i do the outer sill first then access to this detail will be tricky, hmm.......
Got the rest of the old panel seam off and discovered what a wonderful tool spot weld cutters are - until you use them on 10 welds and they go blunt

was using one of these
http://www.cromwell.co.uk/KEN5031200K which I am guessing is normal carbon steel - looks like we might have to try and find a cobalt tipped one.
Also am a big fan of 3M roloc disks which I use in my die grinder, brill for cleaning up metal and grinding back welds
So here's a question for you. Having cleaned up the seams they look like this:

The bright bits are bare metal (obviously

) the dark bits are where rust in the seam has pitted the metal. I have cleaned all this up with a wire brush etc but am left with a number of option:
1. Grind the metal right back till even the pitted areas are back to bare metal
2. Treat the pitted areas with Vactan/Hydrate 80 and leave
3. Cut out pitted areas and lay in new metal
Given I want to do this properly and not be coming back to these seams every year what do you suggest?
And finally, this is what it looks like with the lower sill in place. No where near ready for fitting yet but it gives me a boost to see it offered up
Next job is to make up the lower panel and then the floor plates (will PM you for those dimensions fidget)
Hopefully get onto making these up over the next few days - what thickness steel do you use BTW, is 1.0mm to thin?
Cheers,
MM