As long as everything is clean and slides in easily,
I assemble wheel + axle to forks. This will keep forks perpendicular to wheel.
Then with screws on triple tree just snugged, I put some weight on the
bottom of front tire. When forks are just above top of triple tree, just tighten
all screws. And--there you are! Think about adding a fork brace. I have one, deff.
adds stability to front end.