For those who don't like the sandwiching part--I have a suggestion!
If you don't like to sandwich because you don't like getting on the floor (I understand, it hurts my knees too!), see if you can find someplace that will let you borrow some large tables. I use the tables in my library at school after the last bell rings--it only takes me about an hour to tape down and pin baste a twin quilt. For a donation to the local PTA a school librarian might let you use her tables! or contact your local library or community center. Having the quilt on several tables pushed together makes it so easy to sandwich.
Good luck!