I've layed that same pattern out on a lid just like yours. Take your hole plugs that came with the lid and screw them back in. At that point you can lay your holes out in a manner so as not to have any of your new holes landing on top of the 2 old holes. It's completely do-able. May have to try it a couple of times to get right. But that way you eliminate hot spot issues.
Also I would recommend going with eight 1/2" holes instead of 3/8".
UDS, mini wsm, 22.5" weber kettle