|Darksol the Painbringer|
Metamagic rods can be quite inconvenient for folks who rely on weapons and shields. If you're really determined to use a rod without dropping your weapon you could try the widely despised and previously nerfed weapon cord. That way you can hold the rod in one hand while the weapon dangles from the other. At least per PFS you should be able to cast spells with the hand the weapon dangles from.
You could also try holding the rod in the hand the weapon dangles from, but that might lead to questions about whether the rod in question is a weapon since some rods are. Making sure your rod is a weapon would probably let you benefit from Quick Draw even if the phrase "your rod is a weapon" makes me think of Hanzo the Razor.