I asked about double length inserts at one point for a project, I was planning on using one of Alpha's Inception barrel backs and a standard cocker threaded freak back with a short tip or a Deadly Wind barrel for the project.
The part I am interested in is the small bore inserts that are double length but at this point I am not in the market since they will likely cost far more than I am able to afford right now due to setup costs. If it can be done for a decent price I would be on board again.
Everyone says "Well maybe i'll make a difference",
Thinking they've got plenty of time
But you're squeezed a little tighter everyday
Finished before you can commit a crime