TaDa...I am not sure how easy those studs are to get out without defoming the flimsy metal rail they are mounted in. I have seen someone had a design for a printed version 2 piece snap together set that just goes over the existing stud. Not sure I can find it again but might be worth a search.
It is fairly simple. When you have it out, drill out the old fastener/ axle being careful to not widen the hole, put the new roller and axle in, crush/mushroom the axle end that fits through the slide with a hammer and you are good to go. I put a good amount of grease on the roller and slide. Instead of a drill you could use an angle grinder or file to be sure you don’t accidentally widen the hole. I was not at my shop when I did it and was tool limited.What's the install like on the ALU ones?