In one of my printing sessions I raised the head to its maximum height. Since then I have not been
able to get rid of vibration, even after bringing the head back to normal height. I have tried tightening
all the components to no avail. Does anyone have experience with this enlarger, or any suggestions in general
on how I could go about locating the source of the problem and (I hope) fix it?

To eliminate other sources of vibration, I have tried removing everything else from the table on which the
enlarger sits. As far as I can tell, nothing has changed in the setup. In fact, during the session
when I messed it up, enlargements prior to raising the head were OK. and since then, I have been unable to
do anything other than contact prints. I normally use it with the ADANG negative carrier and 35mm film.

Thanks --- Karthik