doing two of these mods took me only 5 minutes. i bought 6 1x1x1/4" neo magnets off ebay for $15.
first take the lid off the MJ and the magnet should go about here
then gob a bunch of silicon on the bottom of the magnet and place on the lid, cover the rest of the magnet with silicon so it does not come in contact with the water
put the lid back on and i used a clamp to make sure it didnt undo itself.
and for some reason in the last pic i have the normal mj outlet on it... long story why its like that, but im using this mod for the modded MJ. and lastly another magnet goes on the outside of the tank and its done. i tested it on a 3/8" piece of glass and it worked well... so it will work on my 125... hurray, no more failing suction cups!!!