Just posted on AMK's Facebook page!
I don't think the problem is with the drop tank/pylon (called the MXU-776 for the left and MXU-777 for the right).
It appears to me the issue is the landing gear strut is too short. Looking at the pics posted it appears the the oleo strut is fully compressed going by the drag (scissor) links. Also, the drag brace (extension/retraction arm) should intersect the strut above the tire, not below it.
It could be that AMK used a museum bird with compressed struts as a basis for