i have this six shooter and its working very well for the second year now.
whats good about it is that you can mount it to the can this one or another, hand crank you need to hold in your hand.

before this i had the thunder tiger which was identical to tower's at the time hand crank it was leaking until it just stopped working, opened it, nothing wrong closed it was working for two days and quit again then i said enough and got the six shooter.