people calling most "silver" blades silver is probably a mistake. Most "silver" blades are actually nickel. West Coast Tackle on Hastings carries SILVER plated colorados. The flash of a silver vs nickel blade is significant. The silver blade reflects more light and is visibly brighter. Bryan sells them as loose single blades at .85 c a piece as I recall...they are to the left of the cash register on the front desk.
If you make your own colorado blades, I don't recommned octopus hooks as the turned eye makes the hook sit at a wierd angle...use siwash for sure. also I have just started using a 5 ball bead chain in order to drop the hook back away from the blade. Last season I didnt have any "missed" strikes using a bead chain over a regular barrel swivel.
I also experimented with colored tape on the concave side of the blade...got hits on all colors including plain so dont know if it make a dif.
To address a question earlier in the thread, the blade does need some movement to work. If the drift is fast enough you can just float it down, holding back on a drift is another way to ensure some movement on the blade and certainly dont burn in the retrieve...you can catch fish with a slow retrieve on a colorado blade. I have fished them with and without a float and had much success both ways.