4 days is nothing. They look just fine for being so young.
Remember... On average, you have 361 more days till they are mature. most locks take about a full year to mature. , so you are on the right path. They shouldn't look any tighter or more formed than they do right now.
Starter methods are just that: starters. They are really used to just create a general blueprint for where you want your sections to be. Locks don't form from them, at least not directly. It's a constant 1 step forward 2 steps back process.
