For the second attempt to these slippers, I have not used the pattern at all, just did it by eyes.
Made several rather big changes.

• Wheels are massive for more stability and better shape
• soles were done in double crochet, with an additional patch for the toe-area
• stuffed with foam rubber instead of fiberfill for better shape
• Always crocheyed left to right instead of in the round
• Totally different stitchcount, smaller hook and thinner yarn
• Piece of foamrubber in toes and heels for better shape

Slippers are now so firm you can place a cup of coffee on top of them. If I ever decide -not very likely, since it’s quite a chore- to make them again, it will be with my own alterations and not using the pattern.