Also;  On Work Page 6 see example of roller bridge options being researched and sought.
The next page ( 5 ) has pictures of registering and installing the pickguard / electronics assembly and vibrato assembly;  And the guitar near done except for installing the bridge, lemon oiling the bridge and fretboard, and stringing her up for a test flight.
~ Dealing with the bridge glue ~
Work page 4 of 5
1966 Harmony Special Addition Silhouette
Silvertone  model 1488.

~ Inspections, work, Info and Progress Pages ~
The first picture is a good camera angle of the plastic glue residue and rough distortion on the pickguard.  What earlier looked like bubbles burned into the pickguard plastic, turned out to be bubbles in the glue itself when the glue was sanded off and refaced.  The glue shown here was between 1/16" to 3/32" thick / height on the pickguard, and was rougn enough that the bridge would not sit flat on the pickguard.  Nothing to do but to tape the area off, sand the glue down and compound it flat with the pickguard into a satin sheen that a bead of new modern and less innocuous glue would stick to and hold the bridge to allow operation of the vibrato, since the vibrato moves the strings fore and aft along the axis of the neck and  through the bridge saddle's string slots.  The following pictures show the process that worked excellent.
The next picture is the glue area masked off double thickness of the tape to fence the sanding only upon the hard plastic glue.
Here is after a number of passes getting close to the critical level point.
Time to take the first of several maskings off to see how the progress is going.  The swirls outside the work area are this guitar's history of polishing swirls that the camera can see in it's flash but cannot be seen with the eye.
Several more maskings and removals shows when to stop sanding and start compounding.  Looking good here with a licked-wet thumb wipe across the satin facing.
And even better when the masking is removed and the fine perimeter also compounded and polished into the work.
Now it's time to get the glue off the bottom of the bridge.
Not quite as thick as on the pickguard.
The bridge bottom is sanded against a flat sanding block.  In no time it also turns out excellent.
The marks remaining in near the center of this pic is glue that filled in uneven parts of the rosewood's grain and sanded flat.
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