[Closed] C456 with internal bottom bracket question

Hi folks

Currently running a deore HT2 with hope external BB with 1x10 and 50mm chain line.
Wanting to go with an internal bottom bracket and suitable chainset.

Seen for a good price a Shimano M571 chainset thats octalink.
Google searching for hours on end I get 2 BB lengths needed for my chain line. Either 118mm or 121mm.
Also thinking of going square taper. Google again comes up with a BB length of 113mm

Has anyone with a C456 managed to do this.
I have emailed on one, and am currently awaiting a response.

Cheers.