My new loose footed mainsail arrived earlier this week. It seems to fit perfectly with one glaring exception. The slugs for the sail will not fit in the mast track so I can't put the sail up. I measured and provided the sailmaker with a description of the current slugs but they got it wrong. Is there a name or description of the type of slug used by Hunter that I can use that would be descriptive enough so that they can get it right when I send the sail back to them. It appears Hunter used a distinctive type of slug and that the track in the mast will accept only that type. Thanks!