RSN just asked about LPG storage venting on C27.I have similiar issues with my C30 MkII 1987.There is a plastic box in the stbd side of rear locker.I have resealed the vent but trying to get the lid on the box is a real problem.I tried 2 new tanks, different shape bottom on the first one. It would not fit.The second one had right shape on the bottom but was 1" higher so it would not fit either. I ended up getting the original tank recertified. The lid is still a real bear to get back in place. i am not overly confident with this whole set up.Does anyone else out there have the same trouble. Is there any fixes available?If you have pictures that would be great.ThanksKen