I have a 2001 Hoyt Vortec, I think it has the versa cam. The cam is marked VC-2R. There aren't any cable lengths listed on the Hoyt tune chart for that model & year. the sticker on the bow is marked 39" for the cable length, and 92.5 for the string length. would i use a 39" cable for any draw length? Also, how do i detrmine which idler wheel it has? The idler wheel has a 2 7/8" diameter.