SewNoma ... Thanks for finding it ... our Canadian site had the listing of accessories, but not links with detail
PghPat ... here's a direct link to it for you ........
http://content.janome.com/index.cfm/Machines/Accessories/All/Free_Motion_Quilt_Foot_Set%2C_Convertible_%28High_ Shank%29
The above link also mentions the extra bobbin holder. You just interchange it with the original when you go to do FMQing and it helps get the tension set up for you. Another worthwhile investment for enjoying your 6600 and FMQing all the more!
http://content.janome.com/index.cfm/...tion_quilting)