Haven't decided if I'm going to glue and screw or get the pre-grooved and glue and use EB-TYs clips. I know John H recommends glue and screw so that's probably what I'll do. If I do the pre-grooved though, should I stain/seal along the groove? I thought that might help to prevent the boards from cupping. I won't seal the bottom of the boards though.

Thanks