Ive spent some time pondering on this very subject,in the past.In my thoughts,ive become convinced,that with a 3 under style,and a static risered bow,it needs to have a longer bottom limb,or positive tiller in the bottom limb.In a bow tillered the oposite for split fingered and shooting them 3 under,i noticed more set,in the bottom limb.I dont think its as big a deal on a working handled bow,as there is no set hand posistion,or arrow pass established and can be jockyed around a bit to compensate.Therefore...it can be tillered even.
Hope that makes sense.