breadboard end desing on tables
I have heard that pinned mortise and tennon is the best way of attaching breadboard ends to tables, mostly because of wood movement in the different grain orientations (~8% tangential and ~0% longitudinal)
First question is is this such a problem after wood is finished? would sufficient coats of any kind of varnish create enough of a moisture seal to prevent such drastic movements.
if not, my second question is if wood moves this much then there would be a drastic difference in the edge b/w breadboard and table top edge., are noticeable misalignments seen throughout the year with pinned mortise and tenon breadboards?
my eventual take away would be if I am fine just using biscuits to attach breadboard end or should I use mortise and tenon simply from a durability stand point.