I've been running 12-strand D-97 padded to 16 strands in the loops on my old red, white and green tips for about 6-8 years now without any problems. Of course, those older TD limbs have pretty substantial limb tip overlays, and the glass isn't filed down to the wood in a V like it is below some nocks on the '50s era Kodiaks.
Definitely increases the performance and reduces what little hand shock there is. I recently compared two older set of red tips with a set of newer (within the past 2 years) red/black tips using the same D-97 string at the same brace height on the same B riser with the same three arrows. All the limbs were marked 50#@28 on a B riser. The older limbs were 1 fps and 2fps faster than the newer limbs, basically a wash. When new limbs are touted as being faster than the older limbs, it's due to using low stretch material on the new limbs and comparing them to the old limbs with dacron. Put the same string on each, and they behave the same.
I don't ever expect to have problems with D-97 on my Bear TD limbs, but if a limb should ever break for whatever reason, there are tons of older limbs available at good prices and Bear is making more every day.