The Lester is a great looking wheel.
The simple quick check is to make sure the bearings are settled square on the outer races, then internal bearing spacer should have no, or basically zilch back/forth play, if it is just rattling around in there it is probably too short. A teeny bit short is ok, but a lot is a no go. Some guys would even "pre load" the spacer and make it .010" or so longer-when the axle got tightened, the sleeve compressed a tiny bit, and bearing load was perfect.
You don't have to sweat things that bad though. Bearings are cheap, and spacers are easy to turn.