Dave is giving you steller advice...but I would be a bit more cautious. Dave mentioned that Jaegers may not have used tape(sticky) back spacers and they may have been placed after the fact. And like Dave also mentioned a double pass autocolimation will reveal the spherical rings you are looking for to optimize spherical aberrations. this may have been done and this may be an indication why the spacers are what they are and that the arrows do not line up.

Nothing is set in stone...so check the current alignment before you *THINK* you need to make changes to it. There might be reasons why things are the way they are.

There is pleanty of time to realign the arrows and set the elements up as they theoretically should be.

Good luck.

Rob