Rookie balancer mistake

Many mistakes here.
Balancer on this engine that came with the car looked like crap and one bolt didn't line up. Read the forum to see recommended. Ended up buying a nice one. Fluidamper 720311

So here goes....
Didn't measure snout.
Didnt read the instructions.
I took down a couple burrs on keyway but didn't measure.
Installed fairly well by using a stud and nut to draw it on.
Was going well until it wasn't realizing i hadn't measured and the progress was feeling like i was damaging ****.

I did.

So there is galling. But the key seems like the correct size, but the distance from face of crank down in the hole is about 0.100 less than snout on new damper. I lightly touched up both surfaces with emory although i didn't try too hard to remove grooves as i thought i should ask for advice.

Thanks FABO!


Took some pictures