Hi Paul,
I fitted a Lewmar track size 1. I put slightly more bolts in than the recommended 10cm interval. I went to Cork Week in July, having to motor most of the 145 miles. On the first day with decent wind we were on the beat when there was a 'bang'. Looking around I saw that the track had lifted about 15mm from the deck in the middle part of the track. We continued sailing hoping for the best. On return to the dock I found that most of the nuts were gone! It must have been the vibration when motoring down to Cork. I got more nuts and one of the crew fitted them. He must have been swinging out of them as he sheared a number of the bolts. The next job is to get more bolts and lock nuts.
Apart from the lifting, the track worked very well. Talking to another boat who fitted a Harken track, the thing I found usefull on their track was the automatic release of the track during a tack. This would save time and a body from moving the track on a beat.
Regards,
Donal
Donal Gleeson