yes.. you are, the answer to your question is 'yes' and then you got some recs for inlines that WOULDNT make it tip over.
I was bored so i weighed my inline w/water and slide. came out to 10 ozs. so yes, im pretty sure it would tip.
Bfg has very mini inline ac's by midas, but I don't know if an ssfg would tip it over (I'm guessing the clear ones) they seem compact but I'm wondering if it would actually fit on the bub itself. bbg would probably be able to make an ac to suit your needs since he makes those hybrid acs where they stand up and don't go forward like most ac's (think chubbler but with showerhead or inline or w/e you want)
email him, his email is b _ _ f _ _ _ _ @ b _ _ f _ _ _ _ g _ _ _ _ . com you can fill in the blanjks
Why not try a bigger inline like the Andy D that's the same height as the bub so that they both rest on the table.
Get a K clip to hold the AC on the LW and lay the bubbler on its side with the inline resting on the ground, this wont work if u buy an AC with a 90 degree angle tho