Riderless Horse - Moving Mount Attach Point

[Child_0f_Bodom]

I need riderless horse with mount attachment moved a bit backwards to the saddle. Can anyone make it in low file size? (as low as possible)

When attached, rider would look like this:

 

[TubeSock]

I now know my true worthlessness at modifying models. Good luck, I tried

 

[Child_0f_Bodom]

Thanks for trying.