I have an old Gundlach triple convertible for 8x10 - it's a 12-21-28 rectigraph I believe - brass barrel. One of the lenses has the worst case of separation I've ever seen. The lens housing though is swaged over so the glass can't be easily removed although there was no problem unthreading the lens assembly from the barrel. What would happen if I just immersed the entire lens assembly in acetone for a day or two? Would it get in and disolve the balsam and would it them wash out? How bad would the lens performance be (given that the cell is entirely unusable anyway, except as a 28" lens, anything would be an improvement)?