I have set up my Trailex to have "running boards" and a centerline bunk that slopes by about 4" from the front crossmember to the aft crossmember. I think that this slope helps when launching although it makes recovery a little harder. I do not use the bunk carpeting on the centerline bunk. That bunk has cut into it a shallow "V" and has been waxed and greased. The running boards are very convenient, but they (and the other wood parts) add about 100 to 140 pounds to the trailer weight.
You can see that I have also added 2 x 3 "guide" boards to force the keel of PocketShip into the centerline bunk. This works quite well in combination with using the bow sprit to "line her up." Also note that I have adjusted the winch brackets low enough so that I don't have to remove the bob stay when trailering and/or launching/recovering.
I've had a little trouble launching/recovering from ramps that have a relatively shallow ramp slop. And at low tide, I've discovered that the ramps don't have a constant slope. Further into the river, they usually "shallow" out.
Also note that my side bunks are flexable! They are made of two 1 x 4s attached together (firmly) at the center with 5/16" carriage bolts (using 2 locking nuts) and (loosely) at the ends to allow "slipping". The end bolts hold the two boards together with a little slack so that the boards may slide against each other like leaf springs. It makes for a softer ride on the thin-bottom boat.
Pete McCrary
Tattoo's builder and skipper
Pete McCrary