If you check Bob's web site, which can be found here in the Sponsors section above...Click on "other info"... it will take you to "riser and limb charts". [ Cheyenne, Shawnee, and ILF ] That will show you the various combinations that can be put together along with the suggested draw length's suggested for the length bows your thinking of putting together..
One thing as Caution !! Bob's bows are addicting
I currently have 5 including: 2 ILF's, a Shawnee, a Cheyenne, and a earlier "T/D" [ basically a Cheyenne prototype as it takes the same limbs ]
My "B" length "T/D" riser and a set of "D" length bamboo limbs give me a 62#62" T/D R/C which is the fastest bow I have ever owned.
If you check out those charts you'll see that it's possible to get a :
Shawnee up to 64-68" with a set of "F" on one of his 3 basic riser lengths.
Cheyenne's, up to 60-64" with "D" limbs depending on riser length.
ILF's can come in at 62-68" with XXL limbs depending on riser length.
Gene