Share 'Question about neck dovetail shims'

In the past, when building guitars, or re-setting necks, I have always glued the shims into the dovetail cavity of the guitar.  Is there any reason why the shims couldn't be glued to the neck part of the dovetail?  It would be easier to take wood off the shims, and leave more support wood in the actual dovetail, itself.  I typically use maple veneer, or maple tongue blades for the shims. I'm pret…