Running clock signals from LED displays.

[phantompowers]

I have bent a PSR-215 and it sounds great. What would make it better though, is syncing it up to the rest of my kit.
What I plan to do is this:-
On the LED display on the keyboard there is a light that flashes along with the beat count. So, I thought I could add another LED in series, make that into a vactrol and then I could have a signal that pulsed on each beat of the bar.
Is this the best way to go about this?
If I can get it to work, I can send the clock signal to a 4017 sequencer, which will be connected to an APC or similar, and then I can add interesting bass lines,melodies etc, all perfectly in sync. There is plenty of room to house it all in the PSR which will make an awesome workstation.
Thoughts anyone?

[Circuitbenders]

Do you need to add a vactrol? Surely the voltage pulse that powers the PSR's LED is already a signal that pulses on the beat isn't it?
Can't you just wire something straight into that? Or maybe i'm thinking about this completely wrong. 

[Gordonjcp]

Don't wire it in series, wire it in parallel.   You may need to adjust the series resistor if there is one.

[phantompowers]

Sorry, I meant in parellel.
So the signal that is going to the LED on the display will be enough to clock the 4017? If so, that makes it a bit easier to make.