I have a wide forefoot and narrow heel, and I have the megas. I also use a custom footbed and LeWedges. It's not 100% perfect, but it's as good as can be expected.
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my bike page - my journal
Current Stable: Trek Emonda SL - Trek Top Fuel 8 - Scattante XRL - Jamis Dakar Expert - Trek 9700 - AlpineStars Al Mega