Thanks for all the comments folks. Going to look at the used MU DL10 today. I plan to keep my MU D8 so do like the idea of having two bikes that fold the same for ease of packing in the back of the truck on trips. I've got a packing system now and it works well for when we hit the road. We own an Airstream so the trailer storage is limited...they don't have a huge storage compartment like other trailers, so the pickup box gets filled.

If I don't buy the MU DL10, then I will look at little more closely at the Swift and others mentioned. The budget I've set for myself kind of precludes the Airnimal (but man that bike looks good Bruce).
I'm in no rush, but this MU DL10 came up on CL so thought I'd better have a look.