First let me say that just as Yew said. Designing the bow from the beginning to be sinew backed is by far the best route to go.
Having said that though,
and:
Having a good supply of sinew, and a nice take down Vine maple with a splinter lifting on the back, I combined the 2 into a useable "take down Holmgaard". Sinew backed, then backed with Diamond back, I hunted Elk with it for 2 weeks last month.
This was my first attempt at #1 a take down bow,#2 Holmgaard designed bow, #3 Vine Maple. I have found recently that Holmgaards were not backed
, were not take down
,and had no string knocks
. Soooo my bow is just a quick shootin little home made bow that I rescued with a bit of sinew, glue, and time.
I agree that use of valuable sinew and time might make one give a lot of consideration prior to undertaking such a repair. But I would give it that consideration.