Machiavelli, if he's talking about Sim tips I have one. Forget 'the ball'.
Your average 732 Sim was probably constructed in the 70's, when Simulation technology was pretty basic compared to today's machines. The ones I've 'flown' most often had sticky balls (ahem) if they even moved at all. They were one of the least realistically simulated elements of the cockpit instrumentation.
The right way to handle a V1 cut in one of these Junkers is to concentrate on the sky pointer. Remember we are talking a SIM here, so I'm not saying ignore the ball in the real thing - but in a Sim, this works.
When the engine fails in the Sim you may or may not cop which one it is through other cues, but if all else fails you, just look at the sky pointer. As yaw creates roll you'll see the divergence clearly. The purists will hate this, but FOR THE SIM IT WORKS. You need to act reasonably snappy, because if you let the roll build up you'll lose it.
Another tip.
When you apply the rudder, put in the amount you think is correct (practice makes perfect!) then HOLD IT. Do NOT be tempted to cycle it - these old sims get confused by that and start displaying all sorts of unwanted behavior.
Get it climbing away, get the gear up, settle down, and now look at the control yoke. If its dead level and you're tracking straight - congratulations, you nailed it. If you need roll to track straight you'll see the yoke is displaced, and the 'down side' is pointing to the leg that needs more rudder. Make that adjustment gently. Trim it, and see how she's doing. Remember speed changes will quickly change the rudder required, so try to fly speed accurately.
Regarding holding it on the runway or not - ask your instructor to let you use a Wet V1 on the first few attempts. If he fails the engine at V1 you'll still have around 8 or 10 knots to gain before Vr. This gives you time to nail the rudder. Get the feel of it. Then try a standard V1 cut and use muscle memory for the input.
Those old sims don't yaw, so it is really challenging to catch a V1 cut with no visual cues. Remember that.
You're a hero when you are consistently doing it right.
The 732 is a real mans aeroplane. A joy to fly. The best days of my flying were on that wee beast. Sadly I now fly a computer with wings.