Not so much with the P20mm, but the O45 is so svelte as to be difficult to handle. I was still in the driver seat (luckily) of my vehicle when I decided to change from the P20 to the O45. As I just finished placing the rear cap on the P20, I grasped the O45 from the bag and it slipped between my fingers and onto my lap. Whew! There is not much to hold on to. I was thinking of VERY judiciously applying thin strips of skateboard tape to the sides to aid in grasping it. Anyone else find this a growing problem? Any solutions to share?