Dan,
ILF = International Limb Fitting
Developed by Earl Hoyt to standardize Olympic equipment.
Jerry,
No tongue-in-cheek, and yes, it's already been done, so not applicable to the present conversation--but expected none the less. That's what makes these boards so enjoyable for most of us. Our opinions vary as much as our current options on what bows, arrows, risers, or limbs we choose to use.
Steven,
They are something special aren't they? I've got an 18" right handed one, and an 18" left handed one. I "may" have bought the first 18" ILF riser he made. What I like most is the ability to change the tiller along with the weight adjustment. Pop in a set of cheap ILF light weight limbs and work on form; then, pop in a set of heavier ones and hit the range, then heavier again and chase elk.
Thanks,
Jim