Mounting hole on GL 75 too far right for Linn LV X

Now that I took out the old Lenco tonaearm, I'm trying to put
an LV X in.

(A) I heard that it would drop straight in? Well on my L75
, the hole is not exactly round, the top part at 12:00 o clock goes slightly straight so its slightly not round. Should I file this out to make round?

And( B) most of all, I dont know whats going on here but, the protractor template shows that the LV X should be about a cm left closer in. Does this mean I have to make a small mounting plate? I got the LV X cuz I thought it would drop right in and be 100% compatible with the existing mounting hole?!?

I would greatly appreciate any help on this!

Thank You

Voltaic