Hi guys,
Firstly many thanks to all for all your info, advice, knowledge, opinions and help. It's great!

interesting about the blades. Worthy of its own topic/thread perhaps? In the meantime I am following what you say (just), and I have to work out which base plate to get (if any) and which blades.
Some more newbie queries:
1) Firstly, any reason not to use an impact driver to get the base plate nut off? Just about off to TotalTools to make an 'investment' (read: male retail therapy

)
2) I assume an original plate in good nick will be hard to find. I note a replacement on the GA spares site. I assume this is a non-original design (too many holes and looks different). It's not the same as the one I have fitted, is it? It would 'dilute' a restoration?
3) I also note the thinner, scalloped blades in the 1962 RPS photo. The GA Spares blades are straight, so non-original as well? More dilution?
4) "fluted'- you mean what I call 'fan blades', i.e. upturned back outer corner?
On that subject, the blades fitted to my Victa Utility w/ the B&S are I suspect also non original. They are straight fan blades that seem way to powerful... Like described elsewhere I mow around, working inwards with the grass ejection inwards to self rake/mulch. However the flap can be 'blown' open (no spring nor attachment for one as far as I can tell) by heavy grass, if that happens the clippings go rows across...so I tend to mow two rows in the middle before I reach there, that way any clippings end up in the middle, overlapping rather than crossing-over and causing more (albeit little) raking. (I assume these are windrows).
4) Windrowers (have to look up)... What about the one on the side of 'Eric' (as you've so named him). It's curved, the one in Jack's pic is square and has some sort of metal wire/bar support.
5) It may be a case of restoring to a good, repaired/working/workable condition then chasing complete originality. It may end up being a 'non-original' restoration rather than complete originality one. Would this be an offence against any laws/customs/sensibilities/deities?
Thanks,