Great information littleguitar.
Personally, I wouldn't be willing to negate the footswitchable reverb of the entire amp to be able to toggle between IIC+ and IV modes if that is what it took to achieve this. Did your modification eliminate the footswitchable reverb of all channels or just Ch3? If it only negated the footswitchable reverb of Ch3......I might be interested? If it negates the footswitchable reverb of all channels....I would not be interested.
I do agree that there could be some nice advantages between footswitchability between the IIC+ and MkIV modes of Ch3. However, I also find it very easy to reach over and make the switch manually between songs....so this added feature would require minimal negative consequences for me to even consider.
I am curious???