sorry to here you feel riped off if you buy a jet central turbine they do more than quoted thrust, i have been flying them for two years and have most off the range and the back up service you get is second to none plus now you get a lifetime warranty you cannot go wrong i went to the gtba comp and a jet central rhino was put on the test rig and at 117 rpm it pushed 17.6kg off pure thrust and the comp is open to all turbine manufacturers and home builders a like there is no BS because they all use the same rig and all the information is loged for all to see if all turbine manufacturers went to the comp we would all get a true data off the turbines we spend are hard earned cash on best regards jetman.