Above. I start with temporary attaching the grab rail with several wooden pieces screwed into the laminate and a piece of string. When the grab rail is in the desired position I remove half of the temporary pieces and replace them with high density (425 kg per cubic meter divinycell pieces shown to the right of the wood piece)
Below. I the lash with carbon filament unidirectional glass to get it into position. The ends are cowered with 45 degree glass cloth. The I use NM-Epoxy as glue covering it with peal ply to get a nice finish. Then I replace the temporarily wooden pieces with Divinycell and repeat the process wich is time consuming but gives very satisfactory result.