I might start another thread on this but since its Infusion specific I'll leave it here...

Since my boat is in really good shape it probably makes sense to go down the path of making it a Mk1.9, not immediately but probably before Nationals. My biggest issue (besides the cost of new boards and sails) is I won't be able to use the old boards once I upgrade, using the stock Nacra upgrade kit. This is an issue as the boat will be sailed on the Chesapeake for training, which is notoriously shallow (someone runs aground on a N20 once a week). Any ideas on how to have a backwards compatible system? I'm thinking a fiberglass/carbon or maybe even vinyl shim that fits in from the top of the trunk and can be removed at will.