In the CUE TAB of the CPB, you can enter any figure even over 1000 seconds.

In the FG TAB of the CPB, then in the OUT section on the right... this is another place where you can adjust the timer. You cannot go above 99.9 seconds here. If you put in 155 you'd expect it to stay at that. But as you type the figures in, MS adds a point after the 15 and you end up with 15.5 as it won't accept anything over 99.9. If you use the arrow keys you still can't step past 99.9.

So you can enter in numbers higher than 99.9 in the CUE TAB of CPB and as long as you don't then go into the FG tab and click into the OUT advance area, or it will revert to a figure less than 99.9.

See attached video.

It's the same for graphic or video cues, so I expect for it's the same for all cue types, but didn't check any others.