Just posting final # here -
The sticker on the firewall said 52 oz. Removed 4 lbs 1 oz = 65 oz
I after replacing the leaking line did a full 30 min vacuum and it took 4 lbs 8 oz - which at 72 oz is way more than 52. Used PAG 100. A/C now ice cold for the first time since I've owned this coach, hopefully stays that way. Lines seem to leak at fittings where there are bends....
Anand