I have an old K75 ('86) with instruments without the gore-tex membrane vents. Apparently some PO has drilled about six 10mm holes for ventilation. Well, at least I guess it's not the original design.
Any ideas if I can simply glue over a patch of gore-tex or somesuch to recreate a water-proof membrane? Or any other ideas? Except the two LCDs are slowly dying the current setup actually seems to work ok.