Bridge placement/scale surprise

[John J]

Ahhh. So on my cutaway 00 build I had glued the fretboard to my neck and bolted it up and went to mark the bridge position with the KMG bridge setter (all I've ever used) when to my surprise I found that it didn't line up with the frets.
I had purchased some slotted ebony fretboards from what I thought was a reputable seller that sold them as 25.4" scale. Through some research and using the StewMac online fret calculator I've determined the scale to be 25.5" and they list the distance from nut to saddle center on high e string as 25.589".
My question is have any of you used their calculator for bridge placement? Do you feel it's accurate? And do you think there is a noticeable difference in feel between the two scales?

[Tim Benware]

Do you feel it's accurate? And do you think there is a noticeable difference in feel between the two scales?

Yes and no.

[John Parchem]

I agree with Tim on both points. In classical guitar construction I have read a scale length needs to change by 5 mm, (about .2") before one can feel the difference. In that world most guitars are 640,650 or 660 mm, showing when a smaller or larger scale is required the change is about 10 mm to make it worthwhile.

[Herman]

For me also a yes and a no.
I used the Stewmac calulator all the time, and after completing the guitars I measured the notes with a strobe tuner. I think the fret positioning is quite correct.
Herman