I've just purchased a 'mint' condition Linhof Super Technika V. It has what I believe is the original bellows which is in like new condition wit h no leaks. I want to keep it that way. Out here in the dry climate of the west, leather dries out. Anyone ever used Lexol or other products to keep a bellows m oist? I have been told that mink oil products are too aggressive. I just want to keep the bellows moist but not soften it to much. Thoughts?