Nope they are very different...PB100 feet have plastic thingies that snap onto the side of the case, and they have othe rplastic thingies that extend when you flip 'em down. PB140/145/145B/150/160/165/165c/170/180/180c feet are screwed on to the case and don't have extending plastic thingies.

Excuse my extreme overuse of the words "thingy" and "thingies", but its the best way for me to put it