Martin Searle replied:
Andrew,
Yep they line up pretty good. I found that the holes in the tracks (I got it from Laser 3yrs back) were slightly small for the rivets I was using so had to use a file to slightly widen them on the track where necessary.
I found the rivets at the ends most awkward since the track wants to straighten out but the sides of the hull have a slight curve. Perhaps this explains why they always shear at the ends
.
There is an article at:
http://www.seasaltersailing.org.uk/newtracksd15.htm
Martin S.