A handy person from New Jersey says:
July 4, 2015
Hi, challenge installing tailpiece as no reference on item on where to start it on outside of door so as to cut proper length. Would you be able to determine using this latch set how long the tailpiece should be from tail out. I tried two at different lengths and all would not work properly. Either too short or I believe too long as once deadbolt tightened key would not turn. Any advice highly appreciated.
Dave from SWISCO responded:
July 7, 2015
We have a couple videos that may help you. Take a look and let me know if you have any questions!