KCNC K-Type external BB spacing querie

Got myself a KCNC K-Type external BB (HTII compatible)
However, unlike most shimano kit etc it comes with no instructions on spacing.
It says: fits 73mm shells with no spacers, and 68mm shells with spacers provided.
However... it comes with shitloads of different spacers, a rubber ring and no indication of where the spacers go and how many are needed. And WTF is the rubber ring for?
Anyone shed any light on this for me please as I need to get my chainline perfect (1x10 setup with LG1)
Also, I have a 68mm BB shell (Meta 4x)
Its this one: http://clee-cycles.co.uk/esite/P1017/product
However, unlike most shimano kit etc it comes with no instructions on spacing.
It says: fits 73mm shells with no spacers, and 68mm shells with spacers provided.
However... it comes with shitloads of different spacers, a rubber ring and no indication of where the spacers go and how many are needed. And WTF is the rubber ring for?

Anyone shed any light on this for me please as I need to get my chainline perfect (1x10 setup with LG1)
Also, I have a 68mm BB shell (Meta 4x)
Its this one: http://clee-cycles.co.uk/esite/P1017/product
0
Posts
shimano 2 and 1
GXP 1 and 1.
and the ring well who knows.
Parktools :?:SheldonBrown
Apprently the rubber ring is for 'discrepencies' with BB Shell width LOL...
So:
1 x 2.5mm spacer non-drive-side
2 x 2.5mm spacer drive-side?
And this should be fine with the LG1 Nick?
Thanks mate. 8)