Hi georgere,
I was looking at the Scag manuals for V Riders and saw what you have for an oil drain. Not sure what serial number series you have, but probably all the same type drain valve. I use an oil withdrawal system that has a small diameter hose connected to a 6 liter spherical tank with a vacuum pump. With the engine warmed up, the hose is inserted into the dipstick tube with the dipstick removed and with a vacuum, withdraws the engine oil thru the tube and into the tank. This makes for a less messy manner to remove the engine oil. The oil base on newer engines has been designed to provide a low point where the hose can position to evacuate the most amount of oil and in some cases actually evacuate more oil than the drain valve will allow to drain out. Some of the larger auto parts store chains show oil withdrawal systems in their catalogs. One company makes a side pump type that is green in color and I had one years back, but the sideways pump action was not easy to use and I replaced it with another brand that has the vacuum pump vertically mounted.
I have several small plastic pans that I have modified to fit under the oil filter to catch the oil as I remove the filter. I place this pan under the filter, and using an ice pick, I punch one hole in the oil filter, turn the oil filter 1/2 turn and punch another hole. This allows the oil filter to partially drain prior to removing it.