I don't think its a problem with my suspension. I've run countless hours of testing and It's right where I want it to be. There are some irregularities when using a gooseneck but I find if you realistically balance your load and don't drive like an a$#hole it works just fine. Now there are a lot of mods out there that are not set up properly. Specifically the center of gravity and proper mass. So that's something to keep in mind. If you have a mod that you enjoy using and find that its a problem let me know I'm happy to take a look. I've fixed a handful of mods for users.
Also to answer your question about the SRW option for custom attachers, I will be adding this in the coming update. I'm now just waiting on RMC to see what the update to their bed-pack will look like. I believe they adjusted the overall mass of the beds so hopefully they are more compatible with my super-duty. Thanks for your continued support and patience.