Picco .28 - best rotostart ?

[DGCON]

Hey all . I need to know the best roto start to get for a picco .28 ,
links would be appreciated

 

[carlg1]

i was told a rotostart backplate off a hpi 4.1/ 25 engine and a 12mm hex as a spacer fits. i didnt get one in the end just pre heated engine during break in or just loosen the glow plug a bit until it starts