Once in the turn try not to stop mid-way around and keep 5 to 7kts going. Seems to work well although on a wet runway any paint markings, ie piano keys, will cause some slip with the nose wheel. MRU used to be a good one with two painted white sticks in the grass for reference! I still don't feel entirely comfortable doing 180's but the advice on the window ledge as a line up is spot on. It always feels like the wing gear is at risk but the Guru's say it's well clear.