I must admit that I am confused as to whether Pachislo is really a game of skill or not?

I havn't had a lot of time to play my new machine (Beast Sapp), but if I play it like a UK machine (i.e just hit spin and hope for the best), I only get a handful of wins.

But it seems that I am ment to be trying to stop the reals at a given point to get a win.. But from what I understand, stopping the 3rd wheel is not really 'skill'.

Basically, if I just hit the stop buttons at random and forget about the 'skill' what will happen? Will I eventually get a win (like a UK machine) or do you have to show a bit of skill to get a decent win?

Jon