Hey Zeke,
I've been borrowing my friends $150 right angle adjuster but have been looking at that JCW tool as a possibility. I couldn't tell from the pic just what the angle was at the tip so I haven't yet taken the $25 gamble. 2&3 carbs are tricky enough with a 90 degree tool that I wonder if an 80 degree tool would work well. If you end up getting one, please post your result here. My friend will be happy you did(haha) as will I.