weird . . . yeah, it sounds like you're in a unique situation; I've got five eheims and none of 'em has ever had this problem . . .
if the GF installs them, at least you'll have someone to blame if it doesn't work
if the GF installs them, at least you'll have someone to blame if it doesn't work
Although she might have banana hands too I was tutoring her in Hapkido after all 

One of my Eheim 2026 Pro II is also leaking from the quick release valve. I think it's time to replace the O-ring. I think Lowes carry a full line of O-rings. Just bring your original o-rings and compare it.
