Bikesmith's cotters are reported to no longer be available. I hope this changes soon, as they are of a quality that is no longer made or readily available.

So, be nice to the good OEM cotters! Today's common cotters are not nearly as hard as the good old ones.

I have a press now, but still use my method of tightening cotters that I used before with apparent good results.

I secure the nut, then, while maintaining torque on the wrench, I tap the cotter's blunt end repeatedly until the nut no longer wants to turn. No heavy walloping here, just tap-tap-tap with a medium hammer. The bearings would be hard to damage unless walloping with a good-sized hammer ensued (I've known bb bearings to endure even walloping).

I was pleased by how much added nut-turning was possible, as the cotters settled more fully using this approach.

If there is wrench clearance for tightening the nut with the press in place, this might be as good.

I've seen cotters readily damaged from not being inserted tightly enough.