Trolley system for engaging with a post of a selected exercise machine

A trolley system for engagement with a post of a selected exercise machine, the trolley system comprising:

• a body forming a channel, the channel to receive the post therethrough;
• a plurality of rollers supported by the body and configured to provide movement of the body along the post such that the plurality of rollers roll up and down the post, the plurality of rollers including at least one roller configured to engage with each side of the post, the post having four sides;
• a bar coupled to the body, the bar extending outward from the body and in a direction perpendicular to the channel;
• and
• a secondary attachment receiver coupled to the body, the secondary attachment receiver having a first port leading into a first elongated conduit and a second port leading into a second elongated conduit, the first elongated conduit and second elongated conduit being vertically aligned within a single plane, the single plane running parallel to the post without intersecting the post, the first port and the second port configured to receive one or more secondary user engageable devices;
• wherein the bar is fixed in the direction perpendicular to the channel and is configured to traverse along the post with the body;
• and
• wherein the secondary attachment receiver extends from the body and is immovably affixed to the body.