Gooseneck holders and page turners, advice please.

Hi I'm seriously thinking of getting these as with my Rheumatoid I get very uncomfortable in bed. I normally have my knees up and prop my PW on them. I'm currently in a bad flare & I'm finding I can't read as long as I'd like because of this.

My plan is to clip it to my wooden headboard and either have it over in front of my face or round the side.

I've been looking on Amazon, UK person here, and thought I'd found a strong one but it appears it's pretty short and I don't think it'll go where I'm thinking.

There are so many and I was wondering if any users of both could let me know which they've found really good for length and strength/durability. It's not likely I'd move it often once set up.

Thanks friends I appreciate your help.