Had to remove the props on my DP drive today. The local marina didn't have the "special tool" but wanted $90 to order one. I found a piece of 2" steel pipe in the basement. 30 seconds with the angle grinder and a couple minutes with a dremel to make the ID a little larger and I had my special tool! Just use a pipe wrench. All in all it cost me about $4 and maybe 15 minutes and worked great!