Video Tutorial: https://www.youtube.com/watch?v=vjvL0eIee-Q start with Blast-Off in shuttle mode. Untab the wings and begin to rotate them downward on the legs' thigh swivels continue to fold the wings around to the underside of the shuttle. Use the hinge joints on the wings to create the top surface of the cannon. You will need to fiddle with the angle of his knees to align the wings just right to form the front of the arm-cannon. Untabbing the thruster section where the silver paint starts also gives you a slight elbow joint, plus the arm still retains the bicep swivel and ratchet joints at the shoulder. For the cannon barrel I used the gun from BotCon 2012 Soundwave. It's the same gun that came with Universe Ironhide/Ratchet. But a variety of weapons can fit in that space. Try some different weapons and find one you like best Use the double hinge joint to collapse the Vortex arm. Now you should have an arm-cannon that closely resembles the in-game model. As well as the Vortex arm being more accurate too. Remove Onslaught's hands from the pegs on the back. Then rotate the arms downward. It will take a bit of work to get the arms to fit snug to the abdomen, but it can be done. Remember to use the waist swivel to your advantage. Also, Onslaught's elbows are on tiny ball joints and tend to pop off easily. All that's left to do is add the combo-gun to the Vortex hand to cover it, and you're left with a pretty mean looking Bruticus. I hope this was helpful It really all comes down to personal preference. I just happened to like the way this looked and thought I would share it. Thanks for viewing!