Nobody answered this yet for you?
I tell you my story.
I used to mod all my Realforces with Krytox205 on rails, SuperLube on mods wires. Never felt that lubing rails was necessary. Mods wires - yes, definitely.
However, thos new HHKBs have lubed mods and they are perfect for me as they are stock.
Rings - I had Novatouches modded with band rings. Was OK.
But when I got Deskeys rings #3 - they were perfect - not to thick to make a difference in feeling, but silencing enough to make it sound nice. Thicker rings would be similar to stock Type-S, like those #5 or even #4. thinner, I wouldn't bother. I think most guys said that #3 is perfect.
Anyway, those new HHKBs sound great out of the box and I'm not planning to mod it.
Just my 2 pennies