From reading the tags on all the valves and windows in the M15 beam line I am summarizing the work done by Steve Dunbar from 2005 to 2014.
VA4: New O-rings Feb 05
Solenoid July 14
W3: New O-rings Feb 05
New Window Feb 05
New Window March 14
VA5: O-rings Feb 05
W1: New window March 14
W2: New Window Jan 05
New Window Sept 07
New O-rings Jan 05
New O-Rings March 18 (Edi)
VA1: New O-Rings Jan 05
New O-Rings ?
New O-Rings March 18 (Edi)