The enclosure is attatched via existing roof bolts on your cart so it does not involve modifying your cart at all to hang the enclosure. It also takes secounds to attach a side to your cart, the main part of installation is assembling the sides which again is easily done.
We have not actually had very many complaints about our doors, we use a unique locking system which involves Plastic locking pins which allow maximum friction without noise/stiffness. Of course they can ware down after several years of use but we will always send out replacements free of charge when the time comes, and they are extremely easy to fit. There is also an option for a hinged door, if interested i could upload pictures for you.
Thanks for all the feedback guys, i really appreciate it and it always helps!