Better using UK Navy helicopters. Delicate things like accordions would be underslung into a cargo net beside well padded things like jeeps, artillery weapons, and other fragile military equipment. We never once damaged an accordion, and only lost the odd jeep or gun when the pilot and crewman forgot they had the cargo net below them.
Those baggage handlers could have learned a lot from us. They wouldn't have dared to throw primed 2" (50mm) rockets and other missiles around like that. They might have lost a finger or two, or maybe the odd airport if they dropped an SS11 or AS12 missile.
Don't try and take an accordion into the cabin of an Irish Ryanair aeroplane. They made me put a Greek bouzouki into the hold and pay them 60 Euros for the privilege. Only musical instruments the size of a small cabin bag were allowed, so most accordions were taboo. Overhead lockers were only for "safe" items like the booze you buy in glass bottles from the Duty Free shop, as the Tunisian cabin crew kindly explained to me. When I went to collect it at Leeds Bradford baggage reclaim a little kid was playing soccer with it while his father was looking for his golf clubs, under a pile of similar baggage. When I opened the soft case the "zouk" had more dents in it than a dodgem car and the bag was scuffed along the bottom edge. The guy who made the instrument and sold it to me had never known any of his instruments being refused into the cabin, but he'd obviously never heard of Ryanair.
I filed a complaint and duly received a bog standard e-mail reply, "As you did not comply with our terms and conditions of carriage then we are not prepared to entertain any claim for damage or loss to property, which in the opinion of our ground staff at Chania airport, was deemed unsuitable for carriage in the cabin of our aircraft."
My sister, who lives in Crete, made some enquiries when it was discovered that ground staff earn a commission for all items they make a surcharge on for carrying in the hold. The smile on the operative's face when she "banned" the instrument from the cabin was a bit of a giveaway. My sister double checked with the luthier in Rethymno and he confirmed mine was the only case he had heard of when a bouzouki had not been allowed in the cabin. It still plays OK, but it looks as though somebody has used it as a baseball bat. Fortunately it wasn't one of those ornate ones with a lot of fancy inlays.