Recived a cylinder stop that bolts up in 36 cal 1858 new model navy and action will work moving lock by hand and thumbing the hammer to full cock. but will not work when stop spring is bolted down, hammer will not pull back but only 1/8" . works good without spring pressure. Has anyone had this problem. Are there any instructions that detail 1858 action for tune? thanks bgraypup Almost there but now having troble seeing what makes lock go down in half cock?