[paulk]

As mentioned in other posts, having the center of effort moved so far forward by the additional sail area of the new jib will mean you may hardly be able to head upwind at all. Macgregor designers built the boat with the sails and mast it has for a reason. Adding more in various places may place loads on the rig and structure that they cannot withstand. Trying to make it work may be more effort than it''s worth. For example, tightening the suggested (and likely quite necessary) backstay to tighten the forestay would essentially end up pushing the base of the mast through the maststep and cracking the keel. This is similar to what happened to the America''s Cup boat that split in two and sank a while back. If you can keep the rig in the boat, flying an oversized chute downwind can be fast and fun, but that works because the boat is balanced more easily for&aft than from side to side. Trying to increase sail area for upwind is a whole different balancing act. IMHO along with others here who suggest that if you need a bigger boat with more sail area, get one.