Not sure what you mean by a 3/4 size hotbar. With the resizing icons, even the default can be shrunk down to 3/4 of it's original size. (Default is 42px icons and I know the scale goes down into the 20's)
Also, with EoF you can hide the spinner (bank selector) via the right-click context menu.
**insert blatent self promoting plug here**
For a hotbar that eliminates dead space, and has some other nifty features, you can
try out mine . I finished the update today.