Sorry for the long lag time between posts, but I've been stacking cord wood all week after work.
I'm a bit wiped out.
Anyway, now for the good news.
I have succeeded in getting the "Pea Whistles to work".
I'll post some pictures of the working model this evening.
EDIT: Here are the pictures as promised.
I'm very pleased to have found a solution to the venturi that not only works great, but is aesthetic to the design.