There is little if any restriction on bikes on the Edinburgh-Queen St train. On a Sunday, it will have 3 carriages, with a total of 2 bike hanging spaces. Each will take at least 3 bikes and I have seen 4 bike on one rack. The train will have 6 doors, you will want to get on at door 2 or 5 (at the rear of the lead carriage or the front of the rear carriage).
I take this train every day and have never been told to get off because the rack is too full.
I take this train every day and have never been told to get off because the rack is too full.