Yes, great subframe ! I'm working on making the mounts for the crossover to the left side of the frame too. It will fit with the battery in place.
I also have a strip of metal ready to weld to the lower clamp near the footrest to connect to the clamp just beneath the saddle for extra strength.
1300cc 217Nm/207Hp NOS-injected VMax (1985), 500 cc 1950 BSA chopper (1983) in pieces, 750 cc CB750 chopper (1990), 300 cc MZ transporthack (1989) winterhack, 900 cc BMW R 90/6 hack (1976) summerhack, 1100 cc BMW R1100GS (1997) daily driver.
Age is an issue of mind over matter. If you don't mind, it doesn't matter ( Mark Twain )