I just posted a video review of the new leak sentinel v4 but I also found out that you can buy just valves and adapters with pump at pretty competitive price compared to OEM valves. This is especially useful for housings that already have the circuit board such as Nauticam
[youtubehq]iWAQKuvzxaM[/youtubehq]
[youtubehq]iWAQKuvzxaM[/youtubehq]