I need the double-ender for Step 5:Hi Game Changer. Why do you need the double ender? Can you just use the snap on the SMB strap to hold the line on the reel, and use the SMB bungie to hold the strap so that the reel is right on the SMB for storage?
"When DSMB is fully launched, retrieve double-ender from BCD D-ring and attach to spool to secure the line."
The double-ender can also be used to assist when winding the spool as you ascend.