Spent ages writing - or rather re-writing - a scene in U&F 4. I had to change a character from a man to a woman. I thought it would be a fairly quick process, but oh no, none of the man's actions or dialogue worked anymore, nor did his partner's reactions to him / her, and so I had to re-do the whole thing - or the whole thing so far, anyway. But it's all good news as the scene is more to my liking now ... which is nice.
Oh yes, and as you may have noticed, I said "his partner". I'm writing police procedure ... which is also nice - and enlightening too.