That's one of the reasons I went with Bowtech as opposed to Mathews. I am a 29inch draw, but, for whatever reason on my Guardian a 28.5 inch module is the same as a 29inch on my Allegiance (you can change the draw length in 5 minutes). Some bows, or maybe it is the strings, are just a little different. My Switchback at 29 was actually a little short.

There is a lot of variation IMO.