JasonR said...
The fcs nubster does fit the adaptor. I think the reason the only have one tab is so you can move the nubster either forward or back in the fcs plugs for short boards that don't have long board boxes.
I bought a knubster and adapetr recently. Had to sand the adapter to get it in the fin box and had to sand the knubster pretty heavily to get it in the adapter.
After 30minutes of sanding and fitting it better make me surf like kelly.
