Hello!
I believe the legs won't properly work without a battery, their internal buffer runs out immediately.
Perhaps create a "speed" version, with only 1 roboport (tbh 50 fast bots is too strong very early game IMO) but with a couple mk1 batteries instead?

After the roboports are charged, the fission generator should generate enough power for the legs without needing a battery. This should work as long as you use fusion robots, since they don't need to be recharged. But if you want I can implement an option for a "speed" version with two batteries but one less roboport.

Oh, I see, thank you!