First build: feedback looper

[glassjarstudio]

Hey all! Like most, I'm here about to attempt my first build! I thought a feedback looper would be a simple enough project to take on for my first build. After looking at a few different diagrams I found one I want to use, except it has an additional momentary switch, which I don't really want to have in my pedal. Also, it shows a 9v battery connection where I am using a 9v adaptor plug which has 3 lugs, I'm not sure if that would be any different or not. Just thought it was worth mentioning. I'm mostly wondering how all of that might change the wiring layout.  Also, I'm not sure if I'm allowed to provide a link to the site which contains the diagram I'm wanting to use (another DIY type site) Dont want to break any rules! If not, it's the basic looper setup: 4 mono jacks, 500k pot, 3pdt switch, on/on switch(to toggle between true bypass or feedback looper), and a bi-color LED.

Any help would be greatly appreciated. Thanks!