I've swapped Hollowtech 2 chainsets several times over the years and they've always popped out easily with a small tap from a mallet but one this morning seemed to get stuck coming out of the drive side cup. Any ideas what might have caused it? In the end I had to stick a metal bar through the hollow axle and tap it out using that. It was almost all the way out on the drive side. No obvious damage or burrs to the axle and everything cleaned up nicely for reinstallation.
I was swapping two chainsets between bikes and both reinstalled just fine with no extra force needed. The one it got stuck on was a 5800 chainset and a Dura-Ace 9000 english threaded cup. It did feel like there was a fair bit of play in the cup when I wiggled the axle but not sure if that's normal when everything is unloaded?