Thanks, just thought of that
I told you the wrong order. You will waste a sould gem doing it the way I said. Do this instead so you don't waste materiels.
1 - Save the game without perks selected
2 - craft the weapon without perks and look at the numbers
3 - go back to the save you made
4 - select the perks
5 - craft the weapon and notice the new damage vs the one you noted.
6 - go back to the save and proceed from there with what way you want to go.