Made several Spinners yesterday, all out of Brown #15 Wire. I put some larger-than-my-usual Blades on a few Frames, Hildebrandt Indiana 3.5 and Colorado 3.5. I used Cabela's Black BB Swivels for the larger Blades...I'm low on my usual Super-Slick Swivels, and only used the better swivels for the Frames with Willow Blades.
It has been my past experience that the Colorado 3.5 were about right for 1/4 ounce "fixed/rigid" Spinnerbaits, and the Indiana 3.5 was a bit too much for a 1/4 ounce Rigid, the Indiana made the Spinnerbait Head/Skirt ride sideways, and even spin around the Blade on a fast retrieve.
Because of the Stability I saw in the 4" Senko on a 1/8 ounce Tip-Up, I made a few with the Harder-Turning Blades to experiment with. The Rig in the pic is exactly that...the Senko4 on 1/8 ounce Tip-Up, 4/0 Mustad 32831, Hildebrandt Indiana 3.5. Went cast it a little while ago in the slightly-swollen Tangipahoa. This one THUMPS and is Absolutely Stable even in that fast Current.
I'm not sure if it's a Center of Gravity issue, or what, but I am loving the Stability Across the Board so far.