spacefm is much quicker than thunar, I'm using udevil as well.
I'm currently working on making the images as small as possible. Currently at 330mb with a text install booting to command-line. The target is 250mb for the first step.
Now that I know it will build and install, as is, I will start from a vanilla base and only add what I need.
I finally have a working live, not installable yet, image @ 207mb!