Martin o-28vs bridge placement

[rusty999]

Can anyone advise me where the bridge should be placed on a Martin 0- 28 vs type acoustic guitar.
I did the usual measuring to the 12 fret and double it plus 2mm etc and it looks like that would put the bridge very low down on the body -- towards the tailblock
The specs say 24.9 scale. I have lost the old drawing I had of the specs for building the guitar. has anyone here build one of these and any info on bridge placement would be very welcome
Rusty

[John Parchem]

Your measurement of twice the the nut to 12th distance plus 2 mm will place the saddle at the high E position. A 12 fret does push the bridge down relative to the look of a 14 fret to the body.

[rusty999]

Thanks John, Am I correct in assuming the low E should be double the distance between nut and 12th fret , and then around 6mm compensation ?
Rusty

[John Parchem]

Actually I miss calculated for a steel string I double and add 1/8" or closer to 3mm to the leading edge of the saddle high E. I square the bridge to the centerline. If my bridge has a preslotted saddle that is it. I glue down the bridge. If I am going to slot the saddle after I glue it down then I add another 1/8" for the low E, draw a line between the 2 E positions and route the tail side of the line.

So 3.175 mm to leading edge of High E and 6.350 mm to leading edge of low E.