The wah pedal is of great interest , so made a lower cost one
prob is that the padels go in 3k -9k range
next is the pot slider mechanism that is tricky to make
even if u made that the Potentiometer you cannot find locally

There were thse solutions
1)home made pedal mechanism
2 )use the LDR wah

as the case is not available . it is full diy and easy
images ::

used a watch case slice
and a pastic from a adapter .
padel hinge is hot glued

will fit LDR wah to avoid pot( expensive)
more to come

cost max 300Rs , with sockets from china