Hi Davew,
Doesn't seem to be any problems with the site our end.
You should have an inline adapter and section of 1/2" hose on the reel end of your current microbore. Push the 1/2" hose over the brass barb and fix with a jubilee clip.
You can get a microbore barb that screws into the brass barb on the reel, but we do not keep them in stock (we could get one for you if you want).