haha, yeah that might be a little too much
I bought myself a toolkit from halfords that has pretty much any single basic tool that you'll need for a roadside repair and added the bear essentials like duct tape, WD40, JB weld, zipties, fuses, electrical tape, a few hose clamps, bit of wire and a 12v test light.
Then added a tyre repair kit, 12v air pump, one of those small jump start kits (looks like an USB brick) and an old dumb phone that I keep around charged just in case.
Funny thing is, most of the time I'll just use my leatherman. But I've used the toolk box once or twice and I was really happy I had them... and I was delighted to be able to help out other folks with the repair kit and jump start a car stranded at a beach in Kerry because they left the lights on and sand made it almost impossible push start the car.
Although no where near the 25kg, it does add a bit of weight but it also adds a big piece of mind... I've used the tools for small jobs here and there