sorry, i probably wasn't very clear, i haven't actually ever used one of these at all. they look good, but i was just wondering if they were big enough to do the job of moving the fuel around cos the bulb looks smaller than the associated primer bulb. if u've had a good experience with them i think i'll get one of those with a savage 25 tank. how did u mount the primer/filter? do u have a tank guard recommendation as well?