In order to answer your question, you have to know if your arrows are spined too weak, too stiff, or just about right. The further toward the front you place weight, the more the shaft is weakened. So if your shafts are already borderline weak, you wouldn't want to do that. If the weight is placed more than a couple of inches behind the front of the shaft, it has a negligible effect on spine.
Maybe picky, but I believe “warf” means a compound riser converted to trad. I'm not sure that term refers to converting a trad riser to use with other trad limbs.