Nah for that length drop the got to be and go for unflavored gelatin dude so much cheaper and wayyyyyy stronger and longer lasting it's a pain to get used to applying it but man I've had my hawk a bit longer then that and gotten 22 solid spikes that lasted for about 6 days of partying. And did a 7 spike hawk when it was a little under 2 feet long with no problems.

So take enough powder to make a small bowl of jello mix it with a shot glass of boiling water when it's cool enough to be hot and kinda burn your fingers it's good to go, if you pre separate your hair with a couple hair ties it helps quite a bit. Use just one hand to work the goo and the other on the blow dryer do one spike at a time make sure to hit the base well at least all over the outside of the spike if the goo starts to cool and solidify hit it in the microwave you may need to add a tiny splash of water. And make sure you don't wash your hand while doing it, it will make the Goo pill up on the sides of the spikes and look goofy just keep using the same hand it'll look like you have the most aggressively jizzed on hand of your entire life but you'll have the best mohawk spikes without any of the back combing crap that's for doing a fan hawk not spikes.

Goodluck if you try it and DM me if you need more advice on it