I made mine as Marty showed me on Youtube. Not really sure if its the best though and will move the trigger to the end. Hopefully Marty will let us know the pros and cons of doing it both ways.
https://www.youtube.com/watch?v=r_so7B8lEwg
I have had the smaller stinger springs not fire at times as well but don't remember which way I had those.
Nothings perfect but I would rather have them on there than not.