Took the car back to Sam's this morning but on the way there was no vibration. When they weren't able to fix a slow leak in the past Jeff used Slime which solved the leak but created the balance problem. They balanced and rotated the tires the other day which increased the vibration because they moved the bad tire to the front. We believe the Slime is continuing to move around in the tire causing the problem to come and go. This morning they unmounted and cleaned out the tire and now the vibration is gone. Hope the slow leak doesn't return. This afternoon Alesa, Jeff & I rode bikes to the grocery store then Alesa and I rode the bikes to Lowe's; about 12 miles on the bikes. (Semicolon use, right or wrong? Don't care) Some time in the pool then Thursday night football. Also spent a bit of time watching them build the groundwater recharge ponds in the back.