New Taylor Uberti 1885 Double Trigger Misfiring

[Joelpend]

Not a Shiloh or even a Sharps but a lot of knowledgeable people on this forum and just hoping maybe some knowledge with this rifle/issue.
I have a friend that purchased a new double trigger Taylor Uberti and it misfires badly. I have taken it apart twice and I think I know what the problem is but do not know a solution. The sear spring is very strong so a lot of pressure on the sear. I believe the fly is not preventing the sear from hitting the half cock legs and thus slowing the hammer fall. The hammer spring is plenty strong. Firing pin is good with no protrusion issue. Why do the half cock hooks also have protrusions that appear to serve no purpose. Will gladly appreciate any hints at how to solve this. Owner has not called Taylor, someone stated Taylor kept their rifle for months once and it was not fixed when they finally got it back. Don't need that. Thanks

[bobw]

Pm Texas Mac he likes 85's and knows them. It is a stretch to ask how to fix a spaghetti gun on shiloh forum. Bobw