That's quite a dip there from the 400s to the 100s the other day! To me it looks like Thumper's body is in the process of resetting what glucose values it calls 'normal'. His body has been so used to high numbers, that it thinks that is normal, so when the insulin kicks in and brings him down to the 100s it thinks the drop means hypo and the liver pumps out glycogen. I wouldn't raise the dose at all. Depending on what the nadir is this weekend, you might consider shaving the dose down to a 1.25u. Right now, it looks like it is a matter of holding the dose for the most part until the body settles down and stops fighting those drops.