To make floating object ala dadocks floating thingymagig

(1)Get your object you want to float and group all brushes together

(2)Set that object to be a func_train entity. (note it dont need a name
   if it is gonna continually move)

(3)make 2 path corner entitys and place them where you want them for the movement
   one should be lower and slightly left of the other to give rocking motion

(4)give these parth corners names and targets so they target eachother on a loop
   (eg pathcorner1: target P1, Targetname P2; Pathcorner2: target P2, targetname P1

(5)then set func train to target one of the pathcorners

(6)wala u have floaty thing

see example attached