Had some time to have a go at this today. Used a bit of mahogany that was once skirting in my old house , must have had this 20 odd years.
Used the dovetail saw to create the slot and then had to open it up bait with a tennon saw .
Started off at about 13mm tapered and thinned it down a bit.
Rebated the top edge down to the thickness of the brass back .
Planned a V in the top tot follow the profile of the back
Run a slot in the piece that covers the brass back 6.6mm
All cut and shaped ready to glue together
Clamped in the vice for an hour
Cleaned it up and filled the open slot with a small plug and sawdust with pva
Put it on the scales and it comes in at just 88 g thats 3 1/8 oz .
Quite pleased how it turned out , sawing the slot for the blade wasnt easy so i think i would joint two or even three pieces together for the next one.
Cheers Bern