I can't put down good results, that is, you're using that "antenna" on the FM25.
If it were my choice, I would not use it. There is no way to tell what the feed impedance is as it is more twinlead than coax. I assume the two ends spread out and make the antenna. Also, mounting it that close to a steel beam will have detrimental effects also. The feedline portion probably radiates as much as the antenna itself.
Just my thoughts. I would be careful, but again, you can't knock good results.