I used a 5mm allen wrench in order to took off the cam followers on my M130 engine. Just insert the short end od the 5 mm allen wrench in the hole of the cam follower that is over the adjuster, prying up using the long part as a support, when you lift the arm of the follower enough , pull it aside of the adjuster, then slide the follower out and took of the follower plate over the vavle. I hope this help, using this method you wont take any risk scratching any part with a tool.
greetings Roberto
