In the later years of carburetor use, there were all sorts of gadgets added to increase mileage, reduce emissions, and so forth. Trying to regulate gas/air mixture using jets and vacuum, controlling timing with vacuum and mechanical advance were very imprecise. Your WAAG system was one of those add ons that folks believed would help. It was also intended to reduce carbon build up in the engine, which was a by-product of limitations of carbureted engines.
When fuel injection and spark advance was controlled by computers, engines were finally able adjust to variable conditions and make things more efficient.
In the case of the WAAG, the addition of the vacuum controlled 'injection' of the alcohol/water mix also required adjusting the timing and changing the carburetor jets.
If you remove the WAAG system, those items should be adjusted back to stock.
In reading about this system, I find mention of adding an 'inhibitor' each time the tank is filled with alcohol/water, and cautions not to run it without the inhibitor. What are you using for inhibitor? Also mention was made of increasing your inspection of vacuum hoses because the alcohol/water mix would degrade them.
According to various articles and sources, the increase in mileage was very little, the increase in emissions was significant. Wonder what the payback period was? (When gas savings covered purchase, installation, and maintenance) It was only to be installed by trained mechanics, who do you have maintaining yours?
To add photos, you can either upload the photos to your storage at iRV2 or use an outside photo upload service like Photobucket. Once your photo is uploaded, then copy the URL of the photo's address and paste it in with the photo icon. (yellow box, mountain and moon)