Bingo
I guess to be 100% correct its the Boswell Quick-N-Easy. Odd that it has evaded Aerofiles. Had wondered if it had a different name, but nothing comes up on searches so looks like its one they missed. The registration looks like there's a digit missing between the 8 and the 7, but it was indeed registered N5187 and checks out on the FAA website.
LM has control
