Just bought a 2020 with the curved ladder. We need another step. I see some old treads about adding an extension. Not sure whether to weld another step straight down from existing last step so when folded will not extend more onto back deck, or continue curve. If I do the latter seems I will need to add a shim or set off to keep new longer ladder from folding down onto exist8ng ladder if I want to keep it from extending over back deck. Anyone have any experience with this, or opinions, or pictures?