I got sick of winding my 6m glass boat up so converted my Brooker (Budget) trailer so that I could drive it on. It also healps where there is nowhere to beach at the ramp.
It cost me about $120. I bought a 5ft length of blue magdalene from Cunninghams plus 4 brackets.
The issue with this trailer is missing the back and second last keel rollers and hitting the cross members. I cut the length into 4 equal pieces, which were perfect.
If you drill the holes for the brackets bolts to be a tight fir the skids won’t float as you submerge them.
It works a treat.