ROYNEU wrote:

Not a rub at all. The spline is installed into one board glued and left
to dry before installing. The spline is nailed the same as the tongue
would have been. Works the same.

Roy

That's pretty time consuming, but certainly it can work.

OTOH, if the spline is snug one could toenail w/o glue. If I were doing
it, I'd probably do it that way...only possible problem is possibility
of the spline tending to split owing to be small piece. But, yes, I'll
grant it can work.