Trying to repair my ECU.

Instead of starting a new thread...Ill thread my question into this one as I think its appropriate and Im repairing my mother boards.

Im a novice solderererer. I like the adjustable heat irons, but do not know what else to look for. I have a couple of those Weller non adjusting irons and Im going to blame the tool for my crappy work. Ha! Any guru info? Someone said to get the soldererer sucker in the kit. They all seem pretty cheap online. Tips? Tricks?

Thanks FABO! Is this a hi-jack if I place this question here?
I am a electronics technician by trade (actually now my official title is Field Service Engineer). There are couple of ways to do this, there is a solder sucker (a iron with a hollow tip on it connected to a squeeze ball) which is what I'd recommend or something called a solderpault (a spring loaded device that after you heat up the solder you just push the button and it will suck the solder out for you. One other method is to use solder braid to wick the solder out. You just sit the braid on the solder joint you want to unsolder and it will wick out all if the solder from the board. Here are some links.

https://www.amazon.com/dp/B074ZDCTLV/?tag=joeychgo-20
https://www.amazon.com/dp/B00068IJSG/?tag=joeychgo-20

https://www.amazon.com/dp/B073TRWY19/?tag=joeychgo-20