When I buy my imacon flexframe 30x20, maybe 7-8 years ago, I own a zenza SQA system and , because there was not the adapter plate for zenza, my mechanical lab modify (say destroy) a film back holder for it. Only to know too late that because the zenza sqa don't fit motor grip (onli SQA-I can) and for it don't work with digital backs. So I have bought a new mamiya 645 pro TL system, with 3 lens, extension tube, viewfinder, motorgrip, etc... Four month after Mamiya announced the new AF body and the new system with lenses that don't fit the older body. Times are changed but I don't know if SQA work with today digital backs. Now I want to go Hasselblad, so if you like to buy this gear I will be happy.