My 6.5 was on one. I didn't rate it. The rollers were located with mild steel washers and split pins. The roller bars were alloy, the pins corroded to the extent that the washers could ride over them and the rollers would drop off. This was a right pain as on recovery there would be a sharp end of alloy bar with a rusty washer on it looking at my shiny gelcoat. In the end I replaced all the pins and washers with s/s items. Most of the original pins had to be drilled out as they'd grown in due to dis-similar metal issues. Also, the rear bunk would/could flip upside down in the water which knackered recovery attempts. This was dealt with by a crappy looking shot chord arrangement.
Meant to say it is impossible for my complete sets of rollers to invert due to their centre of gravity being below the pivot.
I've no idea how old my trailer is however, as I brought it used from Rogue Wave nearly 4 years ago now. The old coupling sub assembly which I've since changed was missing its spec plate.
So it could be the same as your old Hallmark.
Meant to say it is impossible for my complete sets of rollers to invert due to their centre of gravity being below the pivot.
I've no idea how old my trailer is however, as I brought it used from Rogue Wave nearly 4 years ago now. The old coupling sub assembly which I've since changed was missing its spec plate.
So it could be the same as your old Hallmark.
I run 4 Nicholson trailers, one tri-axle for 11m RIB, one twin axle for 6 m Rib and one 22ft twin axle for a Hovercraft, no problems to speak about, all ways found John Nicholson very helpfull.
