[Hit and run]

It looks to me that it's tied ok. (especially like how you fold the leftover bit back under the tie. thanks for showing that part, might steal that from you

)

How does the distance from the center between the forks to the aiming point on the slingshot compare to your regular slingshot?

For TBG drawlength devided by five should be the active length of the bands. (from your chrony results I'd think you already have that).

What you could do is
- lower your anchor point. (But I guess you might not want to do that. )
- tie the bands OTT, that way you have a good inch to adjust your aim upward (no fork over the target) (for OTT you might want to slightly change the way you tie the pouch to get straight bands)

edit:
Thought of 2 things you could try:
- To find out if you have unequal bands you could reverse them, so top band on the bottom and vice versa. (If your lower band is stronger it will pull the ammo downward)
- loop the bottom band around the inside of the fork. (probably not such a good idea because of fork hits)