PocketShip Trailex owners...
I like Dana's (and others') roller modifications to their Trailex trailers to allow access to the keel. I'm not sure I'd want to trailer the boat over distances when the keel is supported by three rollers instead of the carpeted plank originally supplied (worrying that bumps focused on three rollers might damage the keel more than when supported along its entire length). But for storing the boat on a trailer over time (e.g., winter in New Hampshire), it seems that rollers would be preferable.
So I purchased two roller sets from Trailex (they now come as straight cylinders rather than the "V-shaped" configuration Dana received). I removed the keel trough, installed and leveled the rollers (cutting the roller length down to 6"), notched the existing trough sides, and added a spacer block of pressure-treated wood. The trailer is reassembled as shown in the photos below. I've saved all the parts I took off so I can swap back and forth - and changeover is pretty simple.
Now I have to adjust the bow roller support so the centerboard is over a roller and (I hope) the bowsprit doesn't interfere with CRV trunk opening....
All the best,
Mark