Bear A Mag Riser and newer FF compatable limb?

[huntin_sparty]

I have a early A Mag riser in great shape and a newer set of #1 limbs that are FF compatable.  Does the whole bow riser and limbs need to be FF compatable or are the limb tips the most important part?  Not the end of the world but I have a bunch of FF strings in different sizes and would prefer to use from economic standpoint mainly but not saving if it breaks my old riser!
Thanks,
Andrew

[Abear]

I have 90#++ limbs i shoot on my mags , you will be fine

[kuch]

I'd like to see those babies Abear , the 90#++

[huntin_sparty]

Thanks fellas!