Cgs synth

Hello everybody.
I just received my Synthacon PCB from Ken, and a couple of questions
suddenly came up..
I must admit that I`m a total newbie to DIY synth, with no eelctronics
skills whatsoever.. (I`ve built one simple module so far.. thats all)

I`ve seen several solutions around the web regarding this filter, and
decided to try a version with built in "input mixer" and CV control
for both freq. and res. (as seen here http://guitarfool.com/modules/
images/Synthacon01.jpg)
but.. when reading Ken`s web pages and looking at this http://www.cgs
synth.net/modules/pic/wire_cgs35_syntha_vcf_r1.gif
as far as I can see here there are only one CV input pluss two knobs,
one for freq. and one for res.
So what I was wondering was.. where would I add pots. to control/mix
the input signals, and what type of pots would I need to use?
and the same with the CV. Where and how would I add an "amount knob"
to control the amount of the CVin being used to control the freq.
And also.. how to do the same to the Resonance? add a Cv jack and an
amount knob.

Hope someof you can help me with this.. or point me in the right
direction at least :)

thanks in advance.
Rune