Pasting keyframes without losing cycle settings?

[Reindeer]

Let's see if I can explain what I mean.
Say I have a cycle of 48 frames. The keyframe of frame 48 is therefore identical to the keyframe on frame 1. If I change the keyframe on frame 1 and want the cycle to be correct, I must paste keyframe 1 to keyframe 48. But that automatically loses the cycle because pasting makes the keyframe 48, which bears the cycle, revert to a normal keyframe (smooth, linear, etc). Which means I have to tell frame 48 to cycle again.
So, my question is: is there a way to paste a keyframe so that it pastes all attributes whilst keeping the cycle?
If there is, hooray. If there isn't, I kind of wish for this as a feature because sometimes, especially while working at complex cycles which need lots of testing and fine tuning, I find myself forever having to repeat the cycle settings.

[slowtiger]

When I work on a cycle I just set the project's length to the cycle length - easily done with alt-click in the timeline.

[synthsin75]

Or ctrl+left-click for start and ctrl+right-click for end.

[Reindeer]

When I work on a cycle I just set the project's length to the cycle length - easily done with alt-click in the timeline.

Ah, hadn't thought of that. Clever idea, thanks!

[Reindeer]

Or ctrl+left-click for start and ctrl+right-click for end.

True, I use those commands all day long. I just hadn't thought of using them for looping a cycle.