Thanks everyone- "give it some welly" was the solution. They go on nice and firmly with a really strong push. I'm always afraid to break something if it's not going on properly but sometimes force is the answer.
Got some lager that I really need to get out of my FV so appreciate the quick...
New into kegging and this is my first post. I bought 3 refurbished corny kegs as my starter into kegging and my quick disconnects aren't fitting properly. I'm about to test them out but thought I'd ask quickly to see if I'm missing something obvious. The ball lock posts on the kegs I bought...