I had a gigapipe on my zip. Maybe caleb will take a picture of the 'effort' used to get the bugger in! It wouldn't fit in the zona BB shell for some reason until I got molegrips + extension bars on the go But once it was in I had no troubles at all. No wear, no bendage, no creaking. Bearings are a little still, making crankflips very hard indeed but hey if tgs floats your boat, your all good