Hey, regarding rippling, if you have it with a 315 implant i would imagine it would be worse with a larger implant as the implant weight can cause rippling.
You’ll have to see surgeons have a proper assessment of your chest, skin etc to see if they think you’d be able to take that size. Some surgeons will happily take it on and others will say no.
If you don’t have any luck with MYA there are surgeons out there that are willing to go bigger, message me if you want to know where to look xx