If you deal with bikes that have a press fit bottom bracket, you will probably dread removing a press fit BB from the frame. The traditional method requires inserting a metal tool behind the BB cups, and hammering the tool from the other side.
I always dread doing this process, as applying a high force to a carbon frame is always risky. It takes two people to do it properly, as the first person needs both hands to brace the frame properly, while the second person will hold the tool with one hand and a hammer on the other hand.
Sometimes the BB fits into the frame very tightly, and it takes a lot of hard but careful hammering to remove it from the frame. I dislike this kind of brute force method as there is chance of damage to the frame, and the BB will most likely be damaged after it is removed.
I had a few bikes that uses a press fit BB, such as the Java Freccia mini velo, the Canyon Endurace, the Cervelo Aspero and now the Focus Paralane. Installing the press fit BB is not an issue, as there is a threaded tool to press it in smoothly. However, the tough part is removing the BB to access the Di2 wires, hydraulic hose or other stuff inside the frame.
Traditional press fit BB removal tool. The flexible prongs at the end will brace against the back of the BB cups from the inside, while you hammer on the other end.
Insert the tool from this side, and pull the tool through, which will close up the prongs...