I’ve never used GXP before. Is the installation tool the same as the Shimano Hollowtech one please?

Assuming it’s not the press-fit version then, yes, the shells are done up with the same tool.

Yeah, it’ll be screwfit as it predates the plethora of pushfit standards.

I am in the process of trying to change mine. Problem I have is the crankset axle has a collar attached on the non drive side which is stopping me removing the drive side bottom bracket from the crank. I have searched the web but am finding no answers. Did intend putting a picture up here today at some point to see if any of you guys could help. The hollow tech tool does work by the way.

OK ta. I have both the Superstar socket and a Park ring tool HTII types so I should be able to make progress with those 🙂