Oh, I'll just be re-tracing in reverse the exact same route I used to get here from Beagle, which I wrote down in advance. Getting to Ishums only required 7 jumps in excess of my 46ly range. It's just a faff manually having to plot those and many of the non-jumponium ones, physically typing out the name of each next system on my keyboard one at a time to make each jump (Because good luck spotting the star you're looking for on the galaxy map, you'd think it'd be easy with so few of them, but nope, it's faster to type them in).
I believe route plotting will kick in again after about the first 40 jumps or so. That's about how far away from here it stopped working.