I think you are on to something about having an adjustable daggerboard in the front mirage slot when sailing with a jib. Since the drives are so expensive (probably not wise to ahve it hanging out there unattended) , I think I may make a daggerboard out of plywood, but make the depth of it adjustable so that the yak can be properly balanced acccording to the jib being used. For starters, I'll probably rig up something with c-clamps so that I can move it up and down. Once the balance is right, then I'd probably make something with a permanent size. This should allow all of our custom jibs to be custom trimmed for each yak.
These Hobie yaks are sooooo much fun, partly because there seems to be endless ways to play with them with relatively inexpensive and quick modifications, as you can tell by the hundreds of pages and pictures in this forum
I'll have to wait to test out the front daggerboard/jib combo though, as my yak is put away for the winter. In Minnesota, USA, the wet sailing season is over, as it has turned chilly. But...if the front daggerboard turns out to be a good icebreaker...