holy crap !..hope your ok , and to think I saw you pass me about a week ago in Forest hall thinking to myself lovely supe !....i can totally sympathise here Steve , I use the A1 past Gateshead a lot and know where you mean , ...I done my aerotop in a similar fashion about couple months ago not far from there , back end slipped out going round a sharp bend , wet roads just after all day rain , I maintain it was because I hugged the kerb too close and the rear tyre slipped on a drain wasnt even speeding ! tried to correct it , but over steered ....when it takes you by supprise like that with the shock of the moment its not as easy as people might think to recover without any damage ....am so sorry to hear , yours was the way i was aiming to get my aerotop...bomex kit ect , trd vented style bonnet ......
try and salvage all you can though mate , silly things like ashtray , ....wish I had , as had to buy another when i got another supe that didnt have one ...cause once the insurance company take it thats it !....
Beware everyone else !! These slip/spin outs can happen very easily being rear wheel drive , the supra I have now has a larger Spoiler and think it does actually help keep the back end down ...so let Steve's , mine and others am sure , be a warning to everyone else ......and no Jane before you say , it aint because I passed my test 2nd time ! ...lol:)