just purchased a used x calibur spot from someone used, airframe only, I had a couple a few years back, this guy botched this thing all up rigging it. So needless to say I gutted it and am starting over with equipment install and what not. As I am removing the botched up trays and what not he has in it, I noticed he had wedges for the turbine mount that are adding up thrust to the turbine, if I remember right, they should have down not up trust , can someone confirm this for me please