Hi all, This is my first time posting here, and I don't totally know what I'm talking about, so bear with me. We have a 2006 LR3 that had been sagging in the front end. We replaced the air bags because it was time, but the front end would still lose air after sitting parked. After reading around, my husband read that the valve blocks have a tendency to leak air when needing the o rings replaced. So he ordered the o ring kit, and replaced them in the valve block, and then when he started the vehicle up, it would only air up the rear. Decided to try replacing the entire valve block, and now neither the front nor the back will air up. Husband was wondering if using an ID tool would've made any difference (even though some tutorials said it was fine not to use one). What do you think is going on?