To use the brad nailer, the way I did, I was experimenting with spacers to leave the brads exposed when shot. There's a shoe on the gun that is a safety so one can't shoot it like a gun. I used that longer section of spacer after a rebounding brad (hit the rail foot) got close. I also dinged the rail head when the plunger nicked it. I shot across the foot, but found it easier to increase the pressure and use the rail head.
The best result came from a brad exposed 1/4", with the Channel locks I had the leverage to squeeze them over the rail foot. Slicing off the tops left a close enough 'spike'
That rail, got left behind when I policed the area...., that's all.
I dunno about the rail truck house ... I'm making a copper cab for the rail truck. It's purty... and a guy at Ace told me a way to convert a servo into a 5v gear head motor .... sweet and very easy to do.
But I'm glad to have the bridge, it was quick and easy and has become the Company Standard in the washes.
You'll be in my thoughts and prayers, be Blessed.