In racing the Tybee 500 this may there was one Marstom twenty in the mix , it seemed like any time they chose to get the boat dialed in correctly and steer a consistant course it just sailed away at faster speed being substantially lighter .
I don't know of any good method to equalize boats that are this far apart in weight and the coresponding speed advantage.
I;d love to purchase one but don't currently have the extra 25K

The old I-20 will have to do , I think that is the reason for the F-18 weight as well ,-more affordable cost that enable more people to race .
Happy sailing