Warm the cell in the oven (not microwave!) to about 40 or 50 degrees warmer than the optics, (which you want to keep at room temperature). The glass elements should then slide in with enough extra tolerance to not bind. On Jan 4, 2008 2:57 PM, Rob Ratkowski Photography <ratkwski@hawaii.rr.com> wrote:

I then tried to get the assembled lens back into it's cell and somehow even w/ my most careful efforts, it got stuck. I did free it but I now need to clean all surfaces again.