Brick Circular Saw Restoration | Hitachi Circular Saw

This is Hitachi circular saw for brick cutting. It is 100V50/60Hz 1050W, 11A, 9000/min circular saw. This saw is created in 2007. This saw works normal, but the gear housing is broken. I don't have enough tool to fix this problem, I sent it to the welder, but they can't fix it, they said it burn during the processing. I choose my the easy way to fix it, you can see in this video. If somebody know how to weld this type metal, Please guide me. I hope you find something useful & enjoy from this video! I am happy to receive your feedbacks, advices, suggestions to improve myself. Credit: Gear Show - https://www.youtube.com/channel/UCWKqh_3cb6cDiz2ICWc-5Sw