I've cross posted this in "Touring". Probably more appropriate for this sub-forum.
My wife and I do long day rides on our tandem. We're using an Arkel trunk and an OMM rack, but basically we only use the trunk for some tools and discarded clothing. I'm looking to save weight and replace both with a large bag under stoker's seat. Typical loading would be a heavy Craft rain jacket, leg warmers, arm warms, vest, etc. I can find an alternate location for tools if necessary. Would appreciate any or all recommendations.
Note: We have an ST Thudbuster to the bag needs to be large enough so that the seat post attachment is below the Thudbuster. This is probably not an issue for an reasonable size bag.