(Mac): Hiding menu bar for visual displays.

More of a mac display question than Max, but hopefully someone involved in visual displays on this forum will have come across similar problems.

I am using a mac-mini to display 2 identical movies simultaneously through 2 jit.windows. The mac-mini is connected to 2 projectors from its thunderbolt and hdmi ports. When entering fullscreen mode, the default of the mac-mini is to assign one screen as the main and the other as the sub. Because of this, the grey menu bar remains at the top of the main screen. while the sub is in glorious full-screen. A small problem in terms of pixels, but quite frustrating when the screens should be identical.

I have seen a number of apps like "bartender" available but they seem to just dim or blacken-out the menu bar and don't allow you to reclaim these lost pixels. One option is editing files using the plist editor, but i'm a bit wary of that.

Does anyone have any experience or advice?

Thanks a lot!