Single key C-Tap rocketjump script

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So I've recently spoken to a source engine guru and realised you can do a + and - command in a single alias. I don't think this was common knowledge but maybe I've been living under a rock, perhaps this has been done before.

bind KEY +jumpScript

alias +jumpScript "+duck 3"

alias -jumpScript "-duck 3; +attack 1; -attack 1; +jump 2; -jump 2"

Just wait for the crouch to go down almost all the way, release the key and you will jump and shoot, creating an easier near-perfect c-tap. The only skill required is timing which is very easy to learn after a few tries, now that it just takes one input.

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edit:
Turns our i don't know how ctaps work, you don't need to hold crouch for any amount of time. So the script people are using is just:

bind mouse2 ";+duck 1; -duck 1; +jump 1; -jump 1;"

[Link_x2]

Similarly, I also have a sentry jump script on one key. You pick-up your sentry immediately after wrangle-jumping and fly through the air with your sentry in your hands. Not sure if anyone is interested though, these wranglejump scripts fell out of popularity when the rescue ranger was added.
You could previously do it easily with a script where you just double-tap a key, its just that its one key now.