Hello.
     In the past i have gotten help with shafting .60in boblee rec 45lbs at 28 draw is 28 currently using 1916 145gr tip .need spine suggestion for carbons .would 600spine or cx 90 work for me .any input would be helpful.

A .600 is about a perfect match for a 1916.  

I use a Beman 600 with my BW 46# at 28". Does good.

CX 90 would be a good choice too. I shoot both.

My Bob Lees is 62" 42lbs and I pull an honest 29". I have been shooting Goldtip 600 for several years now. I have also shot Epic 600 and 3 River traditional 600. After tuning all fly beautiful. My favorite has become the Goldtip 600, they just seem to last me longer. I have a bad habit of bouncing arrow of rocks her in Arizona.

Ron

600 will work well with 45#