jr
I use tapered leaders all time and it makes a huge difference to turn over of the flies.
Presentation is a big part of any fly fishing so well worth it.
I would perhaps suggest you are going a bit light.
I'd buy a 9ft tapered leader with a 5 or 6 lb point and then tie a 3ft tippet of 4 or 5 lb to the end of it.
Modern co-poly's and flourocarbons mean you can use stronger line with the same dimensions as lighter nylon.
Thats not to say that nylon is a bad thing , far from it
But i would suggest you used a nylon tapered leader down to a 3 or 4 lb point and then a 2 or 3 lb tippet, the give in nylon means it can be lighter in breaking strain, but it will a similar diameter to the co-poly that is stronger.
That old chestnut of personal preference.
As for tying your own, give it a try and see how you do, but i like as few knots in the leader to start with as i can add plenty during fishing
You will need a much stronger butt section though, i'd say 3ft of 12lb, 3 ft of 9lb, 3ft of 6 lb and then a tippet of say 4lb.
IMHO try tapered leaders again, butt go for something with a 6lb tip and add a 5 lb tippet to it
Sandy