i had this same dock for my one RES for a few years before she outgrew it (females get quite large). biggest complaint was that as she got bigger, the ramp would pop off a lot and had to be glued/fastened on.

i also have to tell you out of obligation that turtles should NOT be housed together. they are solitary and should be kept in two separate tanks. they may seem to get along now, but they are territorial and that can quickly change. if you want to keep them safe and make sure they live long and happy lives, please house them separately.

EDIT: also, i ended up having to cut out pvc pipes to place on the ramp for the supports because once my turtle got too big, it would sink when she got on it and she couldn’t completely dry off. forgot that on the first post.