Fixing Ibanez Soundtank switch

[jlo]

I just got a DL5 (digital delay) for a steal but it has the dreaded dodgy switch.   Does it matter what the value of the capacitor is to replace the 1nF in the flip-flop?   Ive read 5nF or even 47nF.  What if it was 1uF?  As I seem to have one of those lying around