I mentioned to AT about doing a 7 grain 75mm motor. I believe they have plans to do a SU 75/10240 motor. I flew my own design at Red Glare this past April. Since I fly all my AT 75 reloads in a snap-ring cases, I did a 7 grain version of the M1850, it simmed as an M-2353. Punched my 85# Patriot to over 5300'. Awesome flight.