Considered going to Kent? Even a little circular/figure-of-8 tour would be nice.
Something like a Victoria > Sittingbourne > Ramsgate > Canterbury West > Ashford International (break and r/r) > Dover Priory > Canterbury East > Victoria tour would go down well in my book.
Of course, I'd be happy too with getting Maindee Curve done in 2009 (which re-reading the link from the OP you're already doing, so I'm considering popping in for this). But above all else, something going up the Glasgow and So' Western would be nice. Maybe also combining such a tour with a trip round the Cumbrian Coast. Of course, a couple of nb 37s again would be nice.
Might take a wee while. But why start at Huddersfield?
So it can pick up at all the same stops the 'Retro Scot' took. Thus, hopefully, getting all the 'normals' that did that tour to do this. Hope that makes sense!
40145 Huddersfield - Man Vic - Bolton - Blackburn - Hellifield - S&C - Carlisle - Tyne Valley - Newcastle (Break/or stay on for the mini tour) - Sunderland - Hartlepool - Durham - Newcastle (Break) - York - Huddersfield - Man Vic - Bolton.