CSR Differential Removal - can't get the long top bolt out. Any ideas?

[MarkTheGoose]

The diff is coming out of my 2005 CSR (probably for the first time ever) so that I can get the prop shaft out. Everything went swimmingly, bolts out of prop shaft at the front of the diff. Both bottom diff mounting bolts loosened. Suspension all dismantled. Drive shafts out of diff. Trolly jack with wooden block under diff. Nut removed from long bolt.

That all took around 45 minutes, with no problems anywhere.

I have now moved the bolt 163mm through the diff, but it needs to go 231mm for the diff to actually come out. It's the classic problem of the spacer now being an interference fit with the bolt. The bolt turns freely in the chassis and diff housing.

Lots of plus gas.

I've been drifting it out with an 11mm coach bolt and have now run out of length. I'm seriously considering cutting the bolt off near the chassis on the head end and then pushing it 50mm back the way it came, to clear the chassis. However, Caterham have no stock of the bolt and of course it's longer than the bolt from the de-dion chassis.

Suggestions on a postcard please