I have a Bear TD with the Fascor limbs, it came in a semi hard zippered case, with gold Bear Archery emblem on the cover. Anyrate, this bow has a paper sticker inside the one limb latch with the number "B10187" I assume this is a "B" handle and of course the ser. no. Now the limbs are marked with a different number. They are marked "1-12891". The wieght for a "B" handle is marked as "B.60"-48#". My real question is, are all Bear TD limbs interchangeable? I know the "76" model are different. Thanks