Second Life Physics Scripting - Pinball #6 - Collision Tester

During this process I created a simple test of the ball bouncing through an object. It has a back wall script on the bottom wall which pushes the ball. I could move the middle wall closer and closer to test for the ball bouncing through at different speeds. I left it for a couple of days to test my theories and the speed change I made fixed the problems.

Here is the code for the back wall.

float maxspeed = 0.8;
default
{
   collision_start(integer total_number)
    {
        //llOwnerSay("Collision start");
        //llOwnerSay(llDetectedName(0) + " collided with me!");
        if ((llDetectedName(0) == "ball") || (llDetectedName(0) == "ball2"))
        {
            // need to find the direction from the backwall to the ball
            vector pos = llGetPos();
            list a = llGetObjectDetails(llDetectedKey(0), ([OBJECT_POS]));
            vector pos2 = llList2Vector(a,0);
            pos.y = pos2.y;  // so we don't get any side to side movement
            vector pos3 = pos2-pos;
            //llOwnerSay("pos = "+(string)pos);
            //llOwnerSay("pos2="+(string)pos2);
            pos3.x = pos3.x*1.5;
            pos3.z = pos3.z*1.5;
            float mag = llVecMag(pos3);
            if (mag>maxspeed)
            {
                float magdev = maxspeed / mag;
                pos3 = pos3 * magdev;
                
                //mag = llVecMag(pos3);
                //llOwnerSay("------adjusted mag down to "+(string)mag);
            }
            //llOwnerSay("pos3 = "+(string)pos3);
            //llOwnerSay("mag3 = "+(string)llVecMag(pos3));
            integer ra = (integer) llFrand(1.0)-1;
            //pos3.y = pos3.y*ra;
            //pos3.y = pos3.y*8;
            //llPushObject(llDetectedKey(0), <8,0,1>, <0,0,0>, FALSE);
            llPushObject(llDetectedKey(0), pos3, <0,0,0>, FALSE);
        }
        //llOwnerSay("Collision done");
    }
}

The code in the ball was the same as the pinball I showed previously. It really just jiggled once in a while.