Just to be clear, Jonathan takes very specific measurements. We're not talking about just chest, length, arms and shoulders. He also needs things like collar, arm eye, waist, upper waist, etc. etc. I had to take about 12+ different measurements for my jacket, but the sheet he sent me had about 20+ measurements on it, he just starred the ones I should take for that particular jacket. But if you took every measurement on that sheet you would have a blueprint for an extremely accurately fitted entire outfit, pants and all.
I just want to emphasize that Jonathan designed the jacket, and I can't speak for if he did the measurements, but I really don't see why not. He's worked in Hollywood for ages on tons of big name productions and he has other iconic jackets besides the Fight Club jackets to his name. There is a big following for the show Firefly and the jacket from that show is another very famous jacket which he created. He's done it tons and tons of times, his list of movies is very long. I also want to say that if you order from him, you are asking for a custom jacket. Brad Pitt's was a custom jacket. It was designed for his body, and it hangs the way it does not only because of how the jacket was made, but also because of how his body is. My Mayhem jacket is very thoroughly thought out – so much so that some of the details are slightly different than Pitt's and that's not because it isn't accurate, but it's because it's tailored for ME and my body is my body, not Brad Pitt's. When I first got the jacket I would wonder, "why is this part slightly different?" and I would inspect the jacket and realize that he really understood how the pieces connected and this piece had to be tailored differently than Pitt's because it fit MY body and not his. Granted, the Mayhem jacket may be a bit more busy in terms of construction than the FC1 jacket. I'm not sure since I don't own the FC1, but the Mayhem is a little more complicated structurally than it appears in pictures. Maybe one day I will upload some pics and point out the differences and why they are not just mistakes, but instead very well thought out design choices that compliment my body type.
I think what people really want is not Brad Pitt's jacket on their body, what they will find really flatters them is a jacket fit to THEIR body. And that is exactly what JAL offers – the original design tailored to YOUR body. Incredible, really. Where else can you get the perfect jacket, in the leather you choose, with the lining you choose, with any modifications you can choose? He will make you a custom jacket from the ground up if that's what you desire. When I inquired about a Mayhem jacket, I almost bought a blue one with red contrast stitching, which default came with 2 stripes across only one arm, and the opposite arm has white elbow padding. He had already designed this alternative Mayhem jacket and it was gorgeous but I disliked some things. I wanted the elbow padding and the stripes on both arms and he was perfectly happy to accommodate that. Hell, I could have asked him to make it green and put weird designs all over it if I really wanted.
Also, you have security when dealing with him. You don't order a jacket and hope for the best based on chest and maybe arm measurements like pretty much every single other manufacturer out there. You get a fabric sample and can make adjustments from there. As he told me when I talked to him the first time, he'd rather "measure 100 times, cut once." So you can verify that fabric sample is what you want until you are completely satisfied. In my case, I let him do the work since he's a professional and I am extremely happy with the outcome.
Anyway, I don't say this because I feel a need to defend my JAL. I will love it regardless of what others think, it is an extremely high quality jacket and I have another jacket that cost the same that just isn't the same level of quality, and certainly not custom fit. I say this because Jonathan is a good guy to work with and he offers what I believe to be the only true reproduction jacket. Like everyone here, I've been all over the internet looking for the right jacket, and I found it with JAL. Even if he wasn't a good guy (which he is) I would still say the jacket is incredible. However you slice it, it's worth it if you want that jacket and you have the cash. You might benefit from reaching out to him. I am sure he would be happy to talk with you. I talked with him via e-mail for a bit before I decided to purchase, and I told him at first that I may not purchase and he was still perfectly willing to provide me with the information I needed. Needless to say, it wasn't long before I e-mailed him back letting him know I wanted to buy something.
Just my 2 cents.