its not the mot man you need to worry about, they generally dont know there a**e from there elbow, if you have no docs for a vehicle it will have to be inspected, and if its age/origin is in question,it will be tested as a "new" vehicle,as per our P50s, which incidentally took 6 mnths to develop to the point where we passed the neccesary type approval tests. talking to the guy who did our test, he commented on the tyre situation saying that he recently failed a vehicle with stabilizers as they are considered road wheels and they were not e marked,neither would he pass it as a tricycle as it in effect had 5 wheels,plus there is a thing called design and construction,which is subjective to say the least. if the tester sees that a 3 wheel vehicle has been fitted with stabilizers, he is within his rights to fail it on the grounds that it is clearly unstable,hence the fitting of said stabilizers, thus constituting "bad design". as for taking off the body, stabilizers etc before test, its true they cant fail something that isnt there, however, if a vehicle is presented for test and appears to be unfinished or incomplete, a refusal of test will be issued. having got a p50 through a test succesfully and registered with dvla,all legal and above board, i feel confident we could get most things through, unfortunately,the time and costs involved in doing so would probably make it not viable. however, if you have money to spare, we would consider taking on such a task. good luck.