the 16sdd foot controller will work with the hog no problem, just hook it up the same way and start saving presets! and supposedly, you can run an a/b switch to both the hog and the 16sdd and switch between which one the foot controller controls. i still havent tried this myself so im not sure how the pedals handle the switch, but it seems very cool.

all that the mod does is make it so that when you set the loop length to >32, the 1 bar count-in is bypassed and it starts recording right away. it seems like a small improvement, but it helps alot.

fwiw, mine had already had the mod done when i got it – im pretty sure EHX made the mod standard sometime before they discontinued the pedal, but dont quote me on that because i got mine used.

hope it helps!