Primitive Archer

I recently finished my first sinew backed bow. I was working on a  HHB static recurve and a splinter lifted during mid-tillering stages. I decided to save the bow by backing it with a heavy layer of sinew.

I let it cure 20 days, finished tillering it, and shot it in about 75X . The tiller was great and I was very happy with it.

I then decided to wrap it with birch bark in the style of some ottoman bows I'd seen pictures of. I was still very happy with it until I strung it again 10 days after wrapping with bark). It immediately displayed some unevenness in the tiller. The lower limb is now a fair bit stiffer in the near handle portion of the bow.

I've tried gently warming the back of the stiff limb and flexing it while strung, which seems to work until i start bringing it in to full draw. The uneven tiller shows up again.

Does anyone have advice on ways to fix this? Should i just scrape the bark off the belly and retiller it to a lighter weight?

The limbs both have some minor twisting, which exaggerates the unnevenness but it is still fairly obvious. I'm concerned about durability more than any cosmetic issue.

Thanks for looking!

Here are the specs and some photos. 66" NTN, 1 3/4" after fades and through midlimb. 55# at 28". HHB with sinew backing. Purple heart side lams at the tips. The birch bark is thinner than paper and glued with diluted TB3. My guess is moisture creeped into the sinew layer when the birch bark was curing. I've been reluctant to shoot it since.

First photo is braced. 2nd drawn to 20, 3rd drawn to 28.

Another nice one, Kyle.   

Great profile! Nicely done!

Here is the unstrung side profile. Net reflex of 1/2 inch immediately after a shooting session. Comes back to about 1 1/4 inch net a few hours later.

Top limb is on the right on the first photo and on the left in the second one.

Really sweet looking bow, nice job!