dragartist,
I am sure we dropped the Scorpion CVRT on the MSP initially. or is my memory playing tricks ? All my pics of that have vanished. This would have been as a 'one off ' overweight drop above the normal 18000lbs AUW. As I recall the load on the last HSP I dropped was a grader/roller or similar.
We did go to Pope AFB when I was at JATE to airdrop the 105mm gun with a One Tonne L/R on top and all the operational kit. The load was followed out by six RHA paras who derigged the platform and set up the gun.
This was an attempt to sell the gun to the US. No go, 'not invented here' but the troops did like the One Tonne L/R !