Q: The other question is can ERC be made so that the object moves a certain amount, for example, if I want the piston to raise 3 in y trans can that be done and can decimal numbers be used and if it can be done then how do I do it? A: I think I know what you are asking, but I may have misunderstood. You can limit the movement in the master channel by forcing the limits, to set a maximum value for the dial of "3.5" and a minimum of "-1.2" you would edit the channel like so:

           valueParm Pistons
                        {
                        name Pistons
                        initValue 0
                        hidden 0
                        forceLimits 
                        min 
                        max 
                        trackingScale 0.004
                        keys
                                {
                                static  0
                                k  0  0
                                }
                        interpStyleLocked 0
                        }

These values refer to Poser Units, the values displayed on the dials may be diffrent if Poser is not set to dislplay measurements in Poser Units. Limits forced in a slave channel will be ignored when the slave is being controled via a master channel. The 'trackingScale' line determins the minimum increment that the dial can change by.