Don't act only on my advice - wait for more a more qualified answer, pease. But I would think that a hole plugged with a bamboo skewer & elmers would be just as structurally sound as the spot was before the hole. So you should be able to plug & re-drill - till all hell breaks loose. I would worry more about getting the forward holes too close to the edge of the material. My rule of thumb is try to leave an amount of meat around the hole equal to the thickness of the material. If that's not clear - I can throw up a sketch from work tomorrow.