This is the way I think this should go:
Large Sewing Kits were 8 slots, 1 weight, until Apr2001.
In Apr2001
- Large Sewing Kits gained 2 extra slots, and decreased in weight to 0.4.
In May2001
- (Existing) Large Sewing Kits transformed into Deluxe Sewing Kits and increased in weight to 4.0.
- (New) Large Sewing Kits returned to vendors at 8 slots, 3 weight.
The following link corroborates this ^, but I'd like to make sure this is correct before any development.
https://web.archive.org/web/20011123...cID=2666.topic
Anyone know more?