Our previous camper was a 87 Ford Trader. The rubber connections with the gas setup looked pretty bloody suspect. All the copper welds were checked & rubber pipes, hose tails & reg were replaced... for peace of mind, also looked like the job was needed.
Our controls to the oven & cooker, when shutting them off, if the knob wasn't truly in the "off" position
(out by say 2mm, where the knob drops into the lockable slot for shut off) the gas would leak slightly, just be careful with that.
Also has a battery powered gas detector installed (available in 12v)... a "must have" especially with those dodgy controlshttp://www.rvworldstore.co.nz/lpg-gas-detector-atwood
The SLOW took ages to get used too, instead of dragging smoke from the exhaust pipe, you drag following road users instead