BIG SHOT® Replacement Parts & Tubing

I've been using a BigShot for 9 year now and don't like the new pouch/Tubing combos as much as the old ones (2001 era). The tubing appears to have much less power than before i.e. really struggling to get the projectiles up to the first branches on the emergent Dipterocarps (55 meter to first branch). The projectile also seems to fall out of the pouch more often than in the old fabric pouchs.
 
From SherrillTree: we suspect that this customers pouch replacement is old stock, possibly dusty dealer inventory. Today’s replacement pouch grasps the projectile very firmly up until release for cleaner, crisper shots. Also, we have more recently included instruction with replacements “to leave only 19-inches of rubber between pouch and horn end which may require either trimming a few inches of tubing or simply pushing the tube further onto the horns than previously removed” (tube length is long to cover oldest Big Shot head models).