Looks like a good job!
The 300ml is an approximation due to residual oil, if you recall my post. It may be just fine but the only way to be sure you're right is to measure the fork oil height. The factory spec with factory springs is 4 5/8" (117mm). If you've changed springs, use the spring supplier's recommendations. They are usually lower, like 5 1/8" or so.
To measure the oil level remove both caps, collapsing the front, lower legs in the fully compressed position. Remove the springs. Measure from the top lip of the fork tube down to the oil level.
Warning:Assuming you're using the centerstand to support the bike, be very careful that you don't dump the bike forward off the stand. The centerstand depends on the over-center position to stay in position and collapsing the front, tipping the bike forward, uses almost all of that over-center angle. With that reduced angle the lightest of bumps can push it off the stand, dropping the bike. To prevent that possibility, use a tie down (or anything suitable) to tie from the stand forward to the frame, preventing it from being able to fold up. Good precaution.
If you own a Mity-Vac it makes a perfect tool for setting the oil level. Set it up with the bleeder cup and use the long hose as your gauge. Mark the desired oil level, measuring from the open end. A piece of tape wrapped around the hose works fine. Slightly overfill the oil, insert the hose lining the mark up with the fork tube top, then pump out the excess.
Tip: When removing the springs it makes an oily mess due to the oil dripping from the springs. By turning the springs against the top of the tube as you remove them, as if you were un-screwing them, it wipes a LOT of that oil off, leaving it in the tube and not all over the bike and floor.