cwoodall

I would say that line is the centerpoint for the saddles on the bridge.  HOWEVER, if you were to look at a regular LP drawing w/ TOM bridge and stop tailpiece, you will notice that the scale length is set at the saddle of the first string.  All other saddles are adjusted to accomodate for string heights and thicknesses, ie. saddles are set further back from the 1st one.  That is why the TOM is positioned on a slight angle with about 1/8" difference in string length between the bass and treble sides.  Like you say, measure twice, cut/drill once, good idea!  

So if you plan to set the single piece bridge/tailpiece unit like on this guitar (perpendicular to the centerline)  make sure there is enough saddle play to accomodate all ranges of intonation for every string.  So adjust the first saddle a little more forward than usual and use that distance for your initial scale length.  Then adjust the rest of the saddles accordingly,  General rule of thumb is to adjust the next saddle back by the thickness of the preceeding string (works for me).  You don't want to run out of intonation adjustment room by the time you reach the low E string.

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Hi..................whatta site. I have an easy question. On the gutarbuild.com site, there is a CAD file for a LP Double Cutaway Custom. I want to mark my acrylic pattern with the centerline and a reference point for the 24-9/16" scale length. There appears to be a "dashed" verticle line at what looks to be the center of the bridge (not the centerline of the holes). Is this the reference point I'm looking for?

........just want to get the correct measurement 3 times, measure twice, cut once..

Thanks,

Curtis