I was making trout sized spinners, 1/8oz, with willow blades that did pretty well but you had to reel them pretty fast. I've also used Indiana blades but there are 2 styles that may help you. For larger spinners in the 1/4oz and larger range you can try the Mag willow or Olympic blade, the reason you need a larger spinner is the smallest size is a #3. They do spin at slow speeds and produce a lot of vibration, another that you may like is the swing blade, these are shallow cupped that look like a willow blade with rounded ends. The CP Swing and Original Rooster Tail spinners use swing blades, they sometimes require a snap of the rod to get the blade going but once you do they will work at all speeds from slow to fast and everywhere in between.