Hi Gaymckay, You can leave a follow-up comment if you'd like. See this eBay Help page: http://pages.ebay.ca/help/feedback/respond.html
Consider your follow-up comment carefully before you post it. Like all the feedback you leave for others, it will stay on your profile and is more a reflection on you than on those you leave it for. With your very low feedback score, you've left one negative, two neutrals, and a handful of backhanded positives, e.g., "Cheap packaging but oh well everything is fine." If the item arrived undamaged, then apparently the packaging was good enough. The rule of thumb is, if it's not important enough to contact the seller or file a dispute over, it's not important enough to mention in feedback. Good luck to you!