Not much of rail guy myself and tend to stick with easy boxes. From the few that I have tried I think it is much easier to boardslide a hand rail than 50-50 them. I have not had much success staying one in a 50-50 when mounting from the side but the 90 or 270 on from the side into a boardslide feels more stable to me.
I did not try any kind of slides on purpose. I ACCIDENTLY went into front board the first attempt and it actually did not feel too bad (cept I cant do front boards)