AS the DM in our group, I'll pick it up right away. I'm not sure how quickly we'll make a change to the new system though. I'll discuss the ideas with my players, but if it looks like it will bring too many changes to the cqampaign at hand, I'd prefer to finish it out in 3E and then switch. If it looks like it will be a seamless change, we'll change once I have a good grasp of the rules. Most likely, we'll probably continue to play 3E for the remainder of the campaign, incorporating good fixes that work seemlessly into the campaign. Once the campaign is done, we'll switch completely if that is what the group wants to do.