Wannabe1, I have a lemonwood bow that is backed only with clarified calfskin (rawhide)...the same material used in banjo heads. It is over sixty years old and has been traveling the road for over two years now to myriad shooters who give it a real go.
A bamboo back osage, unless there is an inherent flaw, will last your lifetime. Just keep it sealed well and shoot the darned thing. By the way, I took a 170 pound buck with the old lemonwood...complete penetration. Your bow will be faster than the old lemonwood that severely follows the string.
Presently I have a selfbow, one piece hickory made by David Mims. That thing is a shooter for sure and I expect it to give me some good hunts.
Here's a photo: