Ok, so I finally worked up the courage to repot... I ended up removing the old back bulb and repotted into the same pot. The were lots of roots and the sphag was sooooo packed. It took forever to pick most of it out. Anyways, also noticed something that looks like what may be a future shoot starting to form on the second oldest back bulb. Hope that one ends up developing too!
Here's the finished product....
Hope I left enough room for growth... I tried to move it forward as much as possible while also tilting it to submerge the roots from the newest growths.
Here's the back bulb...I'm hoping it'll push something out in a couple of months.