pajoube
Excuse my ignorance but was the platform built using a blank plate from PT or are you using it by inserting the forks into square tubing? It appears to be the latter but I wanted to be sure.
I built a similar platform 30 years ago to hold bikes on the back of my motorhome but inserted it into a Reese hitch receiver. I assume that for those who do not have the fork attachment for their PT that they too could build a platform that would insert into the tow receiver, if they have that attachment from PT.
Nice concept and I'm sure that you will find many uses for the platform. As you say, it can be reversed and used to move plants, boxes or anything else that can be supported on the platform.