Looking at the cable pulleys in the picture, set out at the ends of the axle that far from the limbs
would put a lot of added stress on the axle which could result in eventually bending the axle.
If the other cross bow has wider limbs in that area, they could be using the same axle length for
both models, but without the spacers.
The axles on the earlier Barnett's were mild steel and if slightly bent, could be easily straightened.
The pulleys may have to be set that width though to give the cable "Y" section enough cam clearance.
When I levelled the cams on my 2019 Barnett Drop Tine STR, there was not much clearance
between the "Y" section and the cam as it rotated.
This was the crossbow where there was so much negative feed back where it was throwing the
string or dropping it to a lower level on the cam. I purchased that crossbow as a challenge to find
out why so many were having problems. The cam was tilted downward. Levelling the cams ended
that problem, so I submitted feedback to help other readers.
Thanks for sharing.
Take care.