R10 with Almost Golf Balls

[Piggycollins]

I've just purchased the Garmin R10 and will hopefully have it setup in my garden for the majority of the time. However, I live in Manchester so I might have to move the setup indoors quite a lot. I've just watched a video on using the Almost Golf Balls with the R10 and the distances are really consistent but about 10-15% less carry distance. So the question is, is there a setting you guys know of, that I will be able to change to make up for that loss of yards? I think the video mentioned something about changing the elevation settings but I can't seem to find where it said it now. Any help would be very appreciated.

Thanks,
Steve.

[Brettster]

Piggycollins - elevation is changed in E6. Start at +10,000 and go down from there!