Tee Emm, You may be interested to know that I went through BA training in the 70's and part of the checklist was "gear down and locked" even on the basic training course using cherokees with fixed gear. This was to ensure you NEVER forgot the gear when moving on to retractable types later in training.
Also one of my instructors at the time always checked "3 greens" as the throttles were closed on landing . It saved him from a certain wheels up landing at least once!