There is a company out of Italy (dhsign.it) doing some bushings that work like a spherical bearing, that might not be a bad idea if there is some alignment issues?Regarding the alignment, when the bottom bolt is done:
On non drive side:
View attachment 122360
And on the drive side:
View attachment 122359
It is a little bit to one side, but probably less than half a mm from center. I think it is good.
Regarding the spacer length:
When I do tight only one top bolt (bottom also unbolted, to see the movement), this is the result:
The bolt is tight, but there is still a bit of play between the shock and the shock and the rocker arm. IMO, this indicates, that the spacers are a bit too narrow (considering I measured 45mm distance between the two) or (and?) bolts are a bit too long.
When you do both bolts, there is no play, because in a sense, shock is then suspended in the middle of the rocker arm, because rocker arm is very rigid.
As is, I don't think it is a big issue. Currently, I put few 10mm x 18mm x 0,1mm shims between the rocker arm and the shock, to take up the slack. I put more on the drive side, to help with the very slight misalignment, and shock is not pulled in the middle unnecessarily.