Alright.
Dumb question time.
I skimmed through all of the lash designs, and I am at a loss.
Why does the jump tug need to waste space carrying engines and fuel for the lighters?
Replace them with a standardized cargo box. One face mounts to the Jump tug frame.
The other face mounts to a Sunlight tug frame that hauls it away and maneuvers the replacement into place.
Now, make the jump frame massive so it carries hundreds or even thousands of those lash boxes.
Now the Jump frame carries it’s engines, Bridge, fuel, etc. The 51st century equivalent of modern container ships. For the same reason, and Gaining the same benefit..
Now you have a large ship universe where the Megacorps and their huge Lash ships carry the regular trade needed to keep an interstellar society alive, and makes huge fists full of money doing, and the little cargos, to low priority, too irregular or too illicit to make the Lash network and left rotting for the spec traders to eek out a living carrying.
Even better, Put the lash port WAY out of any gravity well. The Jump ship only has to have enough maneuver Fuel and engines to reach the port from whatever the Jump error sphere is, and it only has to be 100 diameters from the most massive components of the Jump port.
Then anything passing through the system only has to be shuttled to a holding yard, and only containers destined to or from this system have to even enter the well.
Unless you severed in the Merchies, or for some odd reason ran way out system, most player characters would never actually see these ships, or the network.
The Megacorps would maintain a veritable fleet of axillaries and enough of them would be armed that Pirates would probably have more luck with the stream to and from the in-system ports to the jump ports.
Enemy commerce raiding would be a much bigger issue, but truthfully, if the enemy has penetrated deep enough to reach you core internal cargo lines, you are in more trouble than loosing the cargo anyway.