The press I made was just a section of all thread (3/4" I think is my most recent one) nuts, and washers. I stepped up in size for the washers to make sure they were big enough to cover multiple sizes, and some rubber washers to protect the bearing cups ( a few of mine were aluminum). Mountain bike headsets are fairly standardized, which is why I said 1" or 1 1/8". Those are the most common sizes. There's tapered headsets, but I don't think those would apply in this situation. more than likely, it'll be 1 1/8". But in the video, the guy said it was a chinese pit bike fork. But, his setup looks like janky..