How to calculate an old pipa scale length?

[lucifera]

Hi guys,im new here.
I've got an old beaten up pipa from china,it's striped down and got a new red and black dye job and lacewood veneer plating.


The original scale lenght was 750 mm from the nut to the point where the two pegs hold the bridge to the soundboard.
I had ordered new ledges,frets and bridge.
The ledges i had received have a width of 37mm from the nut to the first ledge,that's according to Steward Mcdonald's fret position calculator give me a new scale length  of 680mm.

My questions are...
#1,wheres the scale length is dertermined at the 'bridge' ,at the tip where the strings meet the bridge or at the line formed by those holding pegs,or just in front of it where the bridge first comes in contact whit the soundboard.

#2,are my new ledges maybe children sized...?

Thank you pipa lovers.

[davidmdahl]

Welcome to the forum, Lucifera. In case no one here can answer your questions, you might try to track down Dr. Samuel Wong of the Teng Company. He is on Facebook and there is a website for the Teng Company. You might also find an adventurous local guitar maker/luthier who can be of help. He may not know the pipa in particular, but there are aspects of guitar that may also apply to the pipa.

Best wishes,

David

[lucifera]

Thanks David,i'll keep this person's name.

I decided to temporarely put a tailpiece from and old bouzouki and a banjo bridge,so that i can just slide the bridge at the right point.

[david13]

Can you still see the marks from the original frets and bridge?