Strumelia, this is something of thread dredge.
I guess I should apologise for not being active on the site but I have been having just too much fun in the workshop. I have now completed two mountain dulcimers a hurdy gurdy, a crwth, a nordic lyre, two bowed psalteries plus several ukuleles and flutes and am now turning my attention to a rebec, which is how I stumbled across this thread.
I have the plans from Rutgers University and am mulling over whether to build the soprano or the tenor rebec and having built two tenor ukes I do prefer the more mellow tones. Are you still playing your rebec and with your experience do you have a preference for either the soprano or tenor models? The Rutgers one is a soprano and I would have to scale up the plans to get the extra scale length required but this is no real problem.