I don't think its worth it but that's just my opinion you have to decide what works for you.
Spine is gonna on draw length, point weight and shaft length. Myself if I had a 50 lb selfy I would probably start with a 50 lb spine POC full length I draw 29 and adjust point weight and or shaft length to make fly good. Maybe some guys that shoot self bows exclusively will chime in.
Cory