I liked the original very much, but needed a bigger opening for my ¼" guitar cable. Dimensions are 100 mm inner diameter by 30 mm height, with a 13mm diameter hole for the jack. Fits my 3m long standard cable that's 3mm in diameter. not sure how well it would fit a 5m cable oor a thicker one, but there is still room available with mine. I recommend leaving about 15-20cm out of the cable end that's on the inside like in my photo, to allow enough length to be plugged into something without fully unwinding the cable. If you don't need that, leave just the plug sticking out on the inside. If you leave any length of cable out on the inner end that's shorter than ~10cm, the cable tends to catch on itself when winding it, making the process extremely annoying.
The author remixed this model.
I made the plug hole bigger, at 13x13mm. Should fit most ¼" guitar jacks.