I have been spinning Tiger Moths for over 20 years, both Private and Transport Category CofA aircraft, with and without ‘Anti Spin’ strakes fitted.
Trouble is… the original spin recovery problem was in 1941…not in the 1980’s.
As i posted earlier out of the 3 tigers tested at Boscombe for spinning problems ,only one was fitted with bomb racks,if you are flying a tiger which is close to its original design weight then you should not have a spinning problem,the CAA are presumably covering their ar5es and these days who can blame them in our increasingly litigious society.
cheers baz