My solution for Electroshock V3. Though it uses all of the tools, I saved 72%, and I could opt to save less since I have 3 tools left with which to release the crowd, and only one is required to let the required number through.
Nice work again namida. You were right, that one was very easy to patch and in a way that keeps the level looking quite neat. That little lip can't be helped, as it's the only way to stop a Climber going that way, but otherwise I'm quite pleased with the final appearance. Version 4 posted on the other topic.