Mmm...I simply don't want to risk damaging the track pad tabs...Going to try the dental floss stick as it won't damage the rubber. Meanwhile, .I cut a square of transparent sheet plastic from a tomato carton ,folded it in half and cut a semi circle from the fold ,lay the feet upright over the holes and used sticky tape to hold them in...fiddly but haven't damaged anything...and the buttons work(until the sticky tape stops being sticky...