Do you have a reference for this dispensation? Part FCL says:
(d) Crediting. Applicants holding a pilot licence for another category of aircraft, with the exception of balloons, shall be credited with 10 % of their total flight time as PIC on such aircraft up to a maximum of 10 hours. The amount of credit given shall in any case not include the requirements in (a)(2).
Microlight, 3-axis or otherwise is not an EASA category of aircraft!