This is an updated drawing of the Stinger Thruster. I have added a bearing and oil seal for the prop shaft to keep the oil in the housing. I do not have any actual pictures of the updated thrusters yet but will update in the near future.

This is the detail of the new thruster end cap which holds the bearing and oil seal. This type of oil seal could probably be used on a dry thruster also the seal would just have to be turned around. (Spring side out)