Due dc2 end sept/early oct - dd1 will be just over 2 so definitely want a good sling for no.2, especially for first few months. Have been recommended the boba 4g and an ergo one - had the baby bjorn for dd1 and really didn't get on with it, it started to hurt my shoulders after about 15 mins and I barely used it. Want something that spreads the weight more evenly and more comfy/supportive for baby - any recommendations between these two slings or any other brands? I want to be able to use it from newborn ideally. Thanks in advance!