Yeah, you’re right-there is quite a difference between the 2. The I on the C18 is 20’ and 25’ on the C22. The J is 6.5’ vs. 8.12’. Probably just as economical to buy a new sail rather than cut the sail down. I had a quote of $450-600 to convert the 110 to roller furling with the high end including cutting the sail down to fit the furling gear. That included Sunbrella coverings on the Luff and Foot. A new one from Catalina Direct was around $900-950.