Thank you Mark. I've searched mainly on various forum, and tried to emulate a sgpro type spinning GG adapter. I've used a sgpro 72mmm threaded achromat as macro and a real glass bought from an american guy on ebay (photofixation) I asked him for a rounded shaped one (d= 85mm), but i've had to make a central hole by my self here in Italy (by a glass technician). Also I've used a second achromat as a condenser(F 100 and d=42mm) next to the gg on the camera side 2 mm far from the gg and about 12-14 cm far from the camera lens . I've used a mabuchi motor to spin the glass powered with 2x 1,5 volt batteries. I'm really happy with this self built adapter. I used Canon FD prime lenses.

Bye!