The lower leaf on the two leaf tail spring on my Mk2 has broken just behind the bracket.I have read on this forum some time ago about adding a third leaf to beef it up.The spring on Just Aircraft Sky Raider 2& Escapade is the same length&shape,only it is a single leaf approx 8-10mm thick(and I think I can get my hands on one).Question is, has anyone used this type of single leaf spring and how did it fare on a Kit Fox?.I cant see why it would not be ok,but someone might know better by experience