I upgraded my hacker c50 maxx motor shaft

My hacker C50 shaft broke yesterday after work. I was Running My converted Tamiya TNX in a large fence din parking lot, when I hit a building. When I went to asses the damage. The Truck was OK but would not move. I thought I the slipper my have been damaged. Well to my dismay Tine 1/8 shaft snapped. I'm running a losi Xcelorin ESC and 4 cell lipos. Well I had a Feigao 7XL motor that I fried. I took apart the the 7XL and cut it to the length that I thought I would need for the Hacker. Installed it and it worked. Now Have a True 5mm Shaft in my Hacker. We will see how long it lasts. But For Now I save some Cash.