Front wheel bearings change
Put the 3/16" bearings back in, even if you have to buy some fresh ones.  

Your quarter-inch bearings are not sitting in the bearing raceway right which is causing the too tight/loose problem.

They will never sit right, and if you do ride on them the bearings will run on the wrong parts of the cup and cone races.  This will lead to early failure of the cup and cone.

Bearings are cheap - perhaps one or two cans-of-coke in your local currency.  Fit new right-sized bearings with grease, and it will work better.