This is THE best step by step instructions on mango grafting you'll ever come across, no yolk!!! A few minutes spent reading up on this will help perfect your grafting skills, even pros like Cookie Monster can learn a thing or two from this.... and you're welcome.
I appreciate the link but would hardly include this link among the top resources for grafting mangos. This link includes no photos, but more importantly, it does not stress the importance of swelling buds on the scion wood.
My first mango grafts were failures until I learned the importance of choosing scion wood that is ready to grow, as evidenced by swollen buds.
The link also fails to stress the importance of cambian layer contact.
I'm not an expert on this, and hope others will share their opinion on this.
John