I’ve got some fun new updates for the Weight Jumper tool! First, an additional argument for “percent” is available so you can move less than the full amount between joints. Second, there’s now a GUI! Yay! It’s pretty basic so let’s take a look:
At the top, choose the percentage amount of weight you want shifted between the influences, as well as whether or not to only affect selected vertices. Below that, you can either type in the influence names into their respective fields, or load by selected object. Loading a joint into either field will list the skinClusters registered to it in the list below. The first one is selected by default, but if multiple are present you can select the appropriate one here. Then just transfer away!
You can find the updated files here: Weight Jumper