[Therion] Loop closure / deviation of broken clino

Dear all, I recall a discussion here about using a fairly broad sd value to allow loop closure when trying to transfer paper surveys into Therion - I may be misremembering. I recently surveyed a closed loop with a broken clinometer (spinning wildly with no fluid to damp the motion), so for each leg of the survey I have distance and azimouth accurately and slope as an approximation. How would I set up the sd (if indeed this is how I would do it) to close the loop and correct my approximate / estimated slopes? I look forward to hearing from you. Stelios Zacharias