I can't say for certain... but I can't recall seeing anything that suggested that single-top-tube 56 or 60 Hillbornes are in the plan as of now.
Definitely worth a call or e-mail to rbwhq if you're interested in knowing. Yours, Thomas Lynn Skean -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/Pioj6kYgW_sJ. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.