SD Card Holder for 2020 aluminium frame

I was concerned that my SD cards were kicking about on a not very clean working space so I knocked up this holder for two cards. It is intended to be sat in the groove of a horizontal 2020 aluminium frame member and secured in place with a zip tie at each end. Best printed upright with the longitudinal 'tongue' that fits in the 2020 groove to the bed plate.