So this is my current arc. After realising what I'd done, fancasting Dash as Donna Noble it opened up a vaaaaast set of ideas for episodes.
The silent dialogue between Donna and The Doctor always seemed funny to me here. Seems the whole scene was ad-libbed and rubberfacing is just... yes. Well. So of course excitable Dash crammed in here just seemed to work.
Actually I thought it worked so well I made the scene without words and the first frame. Again, I was trying to say more with less and it bit me in the butt. So this was the second version, and was received well in comparison.
It also lead me to stick the Dashface in the last panel on a washing machine due to an off-handed comment.
Logistics-wise the only real annoying part of this was retaining the inner circle of paint on the round window Dash is messing around behind. Eventually faked and painted my way around it. Mostly satisfied with it.