I have read that the CW solid metal valves are as good as Tire Man or Borg products. Notice that no solid metal valve bodies are provided for front tires. You may have trouble checking air pressure on front tire with beauty discs in place although an angled air chuck may work OK. Your story of tire failure is exactly what happened to us near Puyallup, WA. Noobs, our new to us used 79 Delta had new looking tires, a rear dual started thumping and came apart, steel belt cracked both holding tanks. We spent the weekend in a seedy RV camp waiting for the RV Doctor to plastic weld the tanks. it wiped out wiring but fortunately not the propane lines. We paid tourist price for replacement tire. Eventually three other tires blew preceded by thumping sound which was inner and outer tire layers separating and bulging. Don't take sellers word for age of tires or anything else and buy name brand tires. $1200 for six sounds like you did well if it included everything.
