No luck myself
I have had no luck in fixing delaminated tillers. The first time my tiller (a beautiful H&L model 112F) delaminated, I tried to fix it with West epoxy. The tiller had delaminated at the bolt holes attaching the rudderhead fitting to the tiller. I not only refastend the delaminating sections together, I also drilled out two half inch holes partway through the tiller, both from the bottom of the butt end through the separating sections. I partially filled these with epoxy, then stuck plugs made of oak into them to fill the rest of the holes. I "capped" the ends of plugs with more thickened epoxy. The tiller cracked again two weeks later. I replaced it with another H&L tiller. This one also cracked in the same location. This time, I reglued the thing with Gorilla glue, and I put a stainless steel bolt through the end of the tiller from top to bottom (washers at both ends) to strengthen it. Of course, this fix cracked again a few weeks later. My existing tiller (same make and model) has lasted. Why? I'm not sure, but it may have to do with the fact that I drilled the holes for the rudderstock bracket more in the center of the tiller than the other two times. Or, it may be that I have been more carefull about letting water get to the bolt holes. If you do fix your tiller, make sure you have a spare aboard your boat and you can install it easily. You never know.