McCall’s 5525 is a great pattern. It is easy to adapt- I used it a few years ago to create a vintage style coat in lightweight blue tweed and I’m fairly sure you could make a biker-style with a few changes. This time I made view E and pretty much followed the instructions!! start to finish. I ignored the fabric suggestions of cotton/gabardine and chose a really thick wool felt in an olive/khaki colour, which forced me to make a few changes as the number of layers on some of the epaulets/collar areas refused to fit under my machine. The main changes were that I omitted the pockets (as the wool looked like it would sag if I added them), I added tab details on the sleeve instead of the details in the original and there were places on the collar that I just couldn’t topstitch because however I wrestled the material it wouldn’t go through the machine. I also shortened the length slightly and created a bit more structure in the shoulders with some pads made from heavily stitched off-cuts. I made a particularly poor job of the lining – for some reason when I stitched in the bottom hem the lining seemed to be a little to short causing the wool to start to pucker so in my hurry to finish I ended up unpicking it and leaving it to hang free. Luckily you can’t see that from the outside, it fits really well and is very warm.