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Oh yes, in Tutankham's case it would not be possible for me to apply your "trick" due to the time used by scrolling.

Also, if a sprite moves exactly 1 pixel each frame (like carts or elevators in Bagman Comes Back), I can perceive a less smooth movement if every 6 frames the sprite moves instead of 2 pixels (I just tried).

In some situations, however, I may decide to apply your idea.

Thanks again.