Would you care to post where to find the results of these recent studies?
beth and evans discussion of above.
Practical boat owner magizine discussing FAIL.
Ouzo report: Radar reflectors fail test | News | Pbo
only active reflector showed any use.
Given how and when large ships use radar Passive radar reflector have only psychological use.If it make you feel good then fly one but the OP's installation is causing more harm to his safety than a reflector could add to it.
Your own radar with AIS is the way to go....Active reflectors seem to work reasonably well but for there cost and power use i would just my own radar.
Several studies where undertaken by independent agencies because of rundown incidents with large shipping. The results are all more or less the same.