How do I add a "range" switch to an ea tremolo?

[Absentidei]

I'm building an ea tremolo following the schematic found at general guitar gadgets.
http://www.generalguitargadgets.com/pdf/ggg_eat_sc_improved.pdf?phpMyAdmin=4a28f86a515b7883e7bc35a68d4e7b6d&phpMyAdmin=78482479fd7e7fc3768044a841b3e85a

I found that if I replace the 1uf capacitors at c5-7 with 0.33uf capacitors, it oscillates a lot faster.
I would like to add a switch that lets me switch between the normal version and the faster version.
I'm just not sure how to implement it.
Do I have to switch all three capacitors, or can I switch just one of them?
I guess I could use a SPST to add two different sets of c5-7 and connect both to the speed pot, but I'm thinking it should be possible with a spdt...

[GGBB]

You can do it with an on/off 3-pole switch (3PST?) or one side of a 3PDT.  But it takes all three poles so if you are putting this on a footswitch you wouldn't be able to include an indicator LED to show you which range is on.  Off course if it's a toggle you will see it.



Another probably simpler way is to just increase the value of R11 to slow it down.  This would functionally be the same as turning the speed knob down.

[samhay]

You might want to take a look at this thread: http://www.diystompboxes.com/smfforum/index.php?topic=95698.0