Oh, that can't be right.
Haynes manual style advise is always far more realistic:-
Surely, if there was a haynes manual for the 155 (hahahahahahahahah) it would simply say:
1a. Look lovingly at the screws and they will undo themselves, and be deposited magically
into your hand.
1b. Then a tasty naked lass (or guy - delete as appropriate) will materialise and gently
massage your privates and make you a hot cup of tea.
1c. Assembly, reverse of removal...
Sounds far more like the truth to me (none of that rust, seized, drilling, crowbars, grinding
tools, hammers and brute force nonsense).
<its been a long nightshift - can you tell>