Roller at end of trailer for alluminum flat/ Semi V boat

[newbiedmv]

Another dumb what if question.

I have a 17' crestliner typical aluminum flat bottom with a semi V bow. I have a universal trailer that allows way to much play on the two bunk board ( It can go from hauling a 14' john boat to a 18' glass with a hammer and 5 minutes, with the boat off of course).

I messed up awhile back and tore off a bunk board as it flipped ( this forum fixed it thanks). Well it's lopsided now. I know how to fix it but I also know it will come back. I am toying with a few Ideas all involve limiting the bunk boards movement to some degree, at least so they don't jiggle down parking the truck after launch and going back ( oh yeah they do). I can put a few bolts in, have some small welds done, etc.

Well I looked at my 13' row boat trailer and it has a  center self centering roller on the back ( large one). I have no idea if this will help as the incoming profile is different from what I remember. I was thinking putting in a large self centering roller on the back center "ridge" mounted flush so it doesn't take weight when going down the road.

 

Below is link to a picture of the trailer, note you can see it but each bunk is completely independent and floating it can and will go from the center to the edge. The cross arms are sloped downward from each side to the center.

I'm not that good with mechanical redneck engineering( electrical yes).

Any and all comments welcome.

It's going to my"worst" Potomac ramp Sunday with my neighbor and his pontoon. I'll be out all day so I can mess with it as needed ( I can beach it up stream).

 

https://www.loadrite.com/trailers/load-rite-galvanized-single-axle-bunk-17/

 

Thanks

[newbiedmv]

Sorry after reading that I realized I'll still have to modify the bunks so the bottom pivot doesn't slide down to the center at the very least. 4 Long galvanized bolts will work. The roller will be good as if I come in to far off it will put me into the side guide boards, if right it will center. Either way I'll know while I'm still in the water.

I have the roller, 50 yrs old but a roller none the less and a few big C clamps from Harbor Freight I can loose. Just clamp it on with some locktight and it's worth a try.

Oh my 13' 1969 Wards rivited and heavily modified. I'd take it out but I need to change both spindle/hub/tires. It was or is indestructible. I have a 69 evinrude 20hp free also.

Oh, this  ramp is on a C&O canal dam where they used the river instead. It has terrible fishing, all flat rock bottom and mean floods every year.

[newbiedmv]

It actually worked today. Felt it hit shift the boat about an inch or so and came in perfect.