I am starting up a holiday let and would like to put in a Superking Zip Link bed in one room, with two single headboards so it can be set up as 2 single beds or one superking. However, I see that this means I will have 2 single beds which are longer than a standard single by 10 cm. This is a good idea as I believe that a single bed is too short for a tall man (or woman!) I know I can get hold of sheets to fit these extra long mattresses, but I see that you don't have extra long single mattress toppers on your site. Do you recommend adding these in a holiday let, or not? I see that the bed you recommend for guest houses is medium with a firm top. You don't recommend me to buy firm mattresses as most other retailers do?