Here's a more common form of a master FBM dial: channels { valueParm tentenFBM { name tentenFBM initValue 0 And here's the "five magic lines" of ERC slave code, in context in a body part: channels { targetGeom tentenFBM { name tentenFBM initValue 0 hidden 0 forceLimits 4 min -100000 max 100000 trackingScale 0.00645372 keys { static 0 k 0 0 } interpStyleLocked 0 valueOpDeltaAdd Figure 2 BODY:2 tentenFBM deltaAddDelta 1.000000