[quote=Dogboy]If the rudder head is foam core, then you could probably drill the holes and then carve out some of the foam and then epoxy the bushing in place. That will give the epoxy some area to adhere to. If you try to epoxy the bushing into a hole that fights tight to the bushing, then all of the epoxy will be scraped off when you push in the bushing.
If the rudder head is solid fiberglass, then consider drilling the holes using a slightly under-sized reamer (a couple thousandths less then the bushing OD) and the tap the bushing in for a press-fit.
Another option, if the rudder head is foam cored, would be to drill the holes in the rudder oversized. Then fill the hole with thickned epoxy. Then re-drill to the final diameter after the epoxy cures. I have done this on Hobie EPO rudders. The epoxy seals the foam and also acts as a bushing. The hole can then also be easily re-filled and re-drilled if the position needs to be adjusted slightly.
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