He knows his car....
There's a trick or two here
One is to put some plastic "sheeting" - I use PET (cola) bottles cut lengthways - over the rubber by the hinge on each side to stop the rubber getting caught by the canvas tearing. It eases the up and down and stops the well rubbers tearing or pulling out. Once down, the canvas folds can be well tucked into the well and the bits of plastic stored in the well too. It's common for the hood to have a small tear near the hinge right on it's lip. Plastic will help stop this
The rear corners of the roof where it sits on the trunk/boot tend to curl up for the reason he says. It can be corrected. Once the roof is down - and if you have smallish hands this is easier - reach down to the rim of the soft-top where the curl is "up" and tuck that under the rim of the frame. Before long, the curl is no longer up but is able to sit flush as it should. My hands are not tiny and I can manage this but if you do the "tucking" before finally bedding the roof in the well, you have a tad more room
