The ProLaunch works best when your unit is within a Stance Mat. Enclosed in the platform box is the instructions to attach the platform to your Stance Mat using velcro. The velcro for the platform will come pre-installed. You will need to attach the loop portion to your Stance Mat and then use the 4" wide hook portion to hold the 2 units together.
Attached you will find the PDF instructions that come with the Platform & Velcro Kit.