Hi Marg,
I found this photo of a dulciborne on the internet. The saddle is sitting really high.
I know a bit about Weissenborns and a bit about dulcimers and a bit about Chinese instrument manufacture of Weissenborns - long story, but I run a small specialist guitar business and have had Weissenborns build for my businessin the past.
Original Weissenborns (1920s) have a slightly higher bridge than acoustic guitarsbut not a higher saddle (as shown in the photo of the dulciborn above). In fact, on an old Weissenborn, the break angle across the saddle is the same as a standard acoustic guitar. Here is a photo of a 1920s Weissenborn:
The high saddle on 'out-of-the-box' Dulciborns does not surprise me at all. I have seen numerous Chinese Weissenborn copies with an unnecessarily high saddle dropped into the bridge slot at the factory. It is an easy job to lift out the bone (or plastic) saddle, mark a pencil line across it about a 1/16" from the bottom, place some sandpaper on a flat surface and sand off to the line. Then re-fit the saddle and test the height of the action. Keep going as required until you get the action you want.
What does surprise about the Dulciborn is the use of a raised fretboard which requires a higher bridge? I know the raised fretboard is a significant feature of the traditional dulcimer and very useful if you are a noter drone player - but in this case it seems like over engineering as 95% of players use DAdd and chord melody playing. I think I would have tried out a lower fretboard and standard acoustic guitar bridge height rather than trying to make the instrument look like a dulcimer for no real advantage. Also I would have shaped a little relief into the fretboard and compensated the saddle. Weissenborns have no frets and a high action for Hawaiian slide guitar playing - hence the bridge is high and not compensated (no need as there are no frets). The problem with a high bridge (particularly if the saddle is then high too) is the torsional stress it places on the guitar top - you have to beef things up more thus reducing the top's ability to vibrate.There can be no 'neck set' on a Weissenborn - the top is flat from nut tobridge, so a little relief sanded in to the fretboardbefore installation of the frets would work wonders for clean playing at a lower action - perhaps this has been done by Gold Tone?
The concept is a great one - and the results seem to meet the goal of producing a louder acoustic lap dulcimer. I think I would have been a bit more radical and really thought about the instrument from a players perspective (low action, much lighter build, compensated for DAdd).
Mind you - don't take what I say as Gospel - In my opinion everything great about Appalachian dulcimer designs and playing styles had actually been perfected by 1890
And it has been downhill ever since then
Robin