Hey Sandy,
Someone has been down this road before, they used to go under "Smart Rail", not sure if they are still under that moniker or have moved on, aneyhoo, theirs was a good product, fastened on with some super duper 3m glue stuff, I was thinking on putting some on the trawler, supposed to make em go faster! Maybe that was a sales gimic.
The product had a good look and feel to it.
OP