I haven't posted to this board in years. Life just intervened too much... but since someone found my email and asked for this info, I have a few old archived pix that may prove useful to anyone endeavouring to do this. Hopefully the pix will suffice without undue text.
This pic is a bit dark but you should still be able to see the cable end in the clutch fork. (I shortened the clutch a bit to gain adequate movement)
Use a heavy section clutch cable if you can. You'll find there will be reduced 'stiction' between the inner and outer of the cable.
I just used an accessory clutch lever and with the standard WLA clutch the lever pressure was quite light.
The combination of foot shift and hand clutch was very easy to use but you can very easily go from 1st gear through to 3rd until you develop some feel in your 'shifter' foot. Setup properly the action is very smooth.
~ Vince (aka enigmas)