Shinespark Timer
I made this specifically as a mod for Black Falcon's Shinespark Controller Item Patch (drain before collecting), but it seems to work without having to use it (I tested it some without his patch, but not extensively).

Anyway, in case anyone is interested, here is my Shinespark Timer.

Basically how it works is, your shinesparks will only last for however long you run with the speed booster echos going. If you charge your shinespark as soon as you're able to, you'll be able to shinespark about 1.5 screen's distance. If you run for 5 screens with the booster echos going, you'll be able to shinespark for 5 screens.

Big thanks to Sadi for helping me find the routine to end the shinesparks.