I have replaced this rope on my P27.
1. What might be the benefits of putting any form of filler over the knot?
For myself, I cannot think of any.
2. My downhaul is exactly as per Parker's diagrams and specs for the P27. The lower section that is knotted [figure of eight] into the rudder blade simply runs up to a Seasure cheek block, which is through bolted underneath the tiller arm, between the cheeks of the rudder stock, from where it leads to a simple 4:1 tackle underneath the tiller arm. So far, it has never jammed ...
In case it is relevant, I took the opportunity to replace the oversize downhaul [it was 10mm, possibly 12mmm dia] fitted by a previous owner with the recommended 6mm dia.
Geoff Sheddick
Parker 27/146 "Stroller'
Geoff Sheddick
Parker 27/146 "Stroller'