-.060 Blade, foresight on a Lee Enfield No 4 MK 2 rifle !

[Snowy Owl]

This is my first posting and here is the picture :

Rifle : Lee Enfield No 4 MK 2 (F)
11/53 (PF 309***

Blade, foresight, Mk 1 (solid base), -.060 (yes, -.060).
Block, band foresight (split), marked 1 H on the rear sloping surface (post 1949 - pre 1954).

If I understand well, that block, band foresight is a .490" tall, that is .030" taller than the original Mk 1 block, band foresight, at .460" and the total height of the block and the blade is exactly the same (.490"-.060"=.430") as the height of the original Mk 1 block and a -.030" blade (.460"-.030"=.430"), right ?

And here is the rub : I will try to "regulate" the rifle (174 gr. bullet at 2,400 f/s or thereabouts) and then, I can see three possible scenarios.
1) I decide to get lucky : the sights are dead on. All is well.
2) I'm not so lucky and the rifle shoots high; I can change the blade, foresight although I am not aware that there is a -.045 blade, foresight for the Lee Enfield No 4 rifle. There would be a gap between the -.060 blade and the -.030 blade.
3) I'm really unlucky and the rifle shoots low. Now, dead end. I have to change the block, band foresight and get an original Mk 1 block (.460" tall). So, back to square A, so to speak - and the -.045 blade, foresight is still missing from the equation.

Questions :

1) Am I right ?
2) Is there somebody out there who has seen a -.060 blade, foresight Mk 1 on a Lee Enfield No 4 MK 2 rifle before ?

Voilà !

Opinions and even facts are very much welcome.

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