Re: Anyone make their own jackets etc.
Don't worry so much about the fabric, if it isn't goretex or not. Most of the waterproof/breathable fabrics all perform similarly well. Focus more on zippers, seams, pockets, pitzips etc. Most jackets tend to leak in these areas regardless of the fabric. Garment should have welded seams and be lined on the inside. Read up on different products and their properties. Also consider, slightly less waterproof = more breathable.