I can't believe I never responded in my own thread.
Answer is that I have no problem peeing standing up. I don't seem to "drain" properly sitting down, so if I'm alone, I always stand. I only sit when I'm using a public ladies'.
However, since I started my RLE, I've had a ritual where I make contact with the toilet seat beforehand. I want to have a good idea of what life would be like without being able to stand.