When loading heavy drop we always had someone watching the top of the load.
Lots of clearance in this training load but a high frame war load was MUCH closer to the cargo door when loading. We sometimes had to have the elevators in the up position. This for me was the most nervous bit of the whole trip.
The CONDEC was designed to to air transportable by the Herc as was most of the US supplied ground equipment. Not always the case with UK kit especially that for other a/c. For example loading the RR Conway with the very low transporter called for a special technique. It would be winched up the ramp until it reached the start of the cargo compartment floor. Then the ramp would be VERY carefully raised to reduce the angle between the two. By this time the nosewheel was off the ground ! As the engine was winched into the a/c the nosewheel would settle back down where it belonged. All those years trying to avoid this situation and here is an authorised scheme to do just that.