I've also had a 8054 and didn't realize it used the 2.25 core. But I had read that you don't have to change the core out again as long as the 2.22 is still there. WU's that don't require the 2.25 will go ahead and fold on the 2.22. I just checked my work history and that is absolutely right! I've folded several 8018's and 8057's since the 8054 and they've all folded on the 2.22 core.