Do they look like hooks on all sizes? Or just the 30 cm? Shows you what little I know... I only have a JPG and assumed in all of my wildlife sightings, that the glides were loops for all birkins. So you can imagine my surpise when I saw the difference on a 30 cm... I also tried on a 35 cm but didn't remember to check the glides as I was too distracted by how its enormous tsize. It looked like I held a minature fridge against me. Btw, do you find it hard to let the straps flap about w/ thise 2/3 glides? And is it too much strain on the flaps if you lock them in place but have the flap tucked in? TIA!