Minimum distance to net?

Hi.

I'm in the unfortunate situation that in my golf room, I simply do not have more than 6 - 6.5 feet from the ball, to the screen I'm hitting in to.

I was therefor wondering if a kind R10 user would perhaps try out their unit indoors, with the ball placed no more than 6.5 feet from a hitting net, and report back to me if it works or not?
I know that Garmin recommends at least 8 feet, but I would just be very interested in hearing if the unit would in any way be accurate, even though the flight distance would be a bit shorter than the recommended 8 feet.