"a couple of taps with a light hammer"!!! As Alex has already commented, what stresses/damage is this doing to the sensitive items attached or linked to the IMS? In 2012 I spoke with Hartech about whether it was possible for them to check & if necessary replace the IMS bearing on my (November 2004 registered) 997.1 with one of the common aftermarket items. They explained they only upgrade the bearing to the post 2006 larger bearing as part of an engine strip down as they have found replacing an early bearing in situ if fraught with potential problems. In their experience bearings hardly ever come out smoothly even with the "removal tool" shown being used on the internet & putting the new one in subjects sensitive internal components to unnecessary stresses.