Re: Sanding the bridge of a flat-top mandolin
Sand the bridge 'along it's length'. Sanding it along it's short axis will round off the front & back edges. Also,if you want it dead flat,use a mirror or some piece of flat glass. Realistically,you should be sanding it on the top of the mandolin itself to get the best fit.
Here's a clip which might help - zoom along to 5 mins into it,
One point,from your description,i'm wondering if the piece of wood from which the bridge was made,has been machined in such a way that it has some residual stress in it. This could mean that as you sand it,the stress is being relieved & is deforming the wood. Try sanding it as i suggested & see how it goes. If it doesn't get any better,then maybe a new bridge is required ?,
Ivan
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