So I’ve tried elasticated laces with a tightening clips on trail shoes, trail routes and those type of hills. Lots to choose from on such as amazon.

They worked very well. Slip on off. Comfortable. They allow stretch when up on toes on climbs, and no doubt allow for foot swelling on very long routes, not that I can do very long routes any more.

Question, has anyone tried them on fell shoes on serious fell terrain?
Do they last? Do they allow too much twist on rough terrain?