I noticed after varnishing both thwart and boat that now the fit seems too tight.  I have to really struggle to get it to sit right.  I suspect its from not cutting along the stencil perfectly.  At the time I had only a very dull sabersaw blade.  Lesson learned but now I wonder:  Could I use a dremmel rotary tool to very slightly widen the gap thereby allowing the thwart to slide easier?  My flotation blocks are done but I wanted to make sure everything was good before I glued them on.  Thoughts?