My first lock mitre joints were on this box many years ago and only the lock mitre bit was used and went through the very hard Jarrah with ease. A few other projects were made the same way then I thought that because I hogged out most of the wood with a straight bit when making sliding dovetails I would try a similar method with lock mitres using a 45° bit in the table. This was successful, then I tried the quicker way on the table saw but the joint wasn't perfect so the next project went back to the 45° bit after which I remembered the first joints done only with the lock mitre bit and so every other time I used lock mitre joints that is how I did/do them, it really is far easier with the one bit, I promise you.
Whilst not easy to see, I guarantee that I made it with lock mitre joints, further, the wood was salvaged my my work bench when I first set up business and operated from home in about 1967.
I still have the box.