Thanks for your help. Here's this block.
Please don't forget, that when I insert this block from
tool pallet in other drawings it's working.
The block is only partially contrained. Open the block editor, click "autoconstrain" and select everything. Seems to work fine after saving the block. The only thing I'd change is that I'd make the basepoint remain at the center of the neck regarless of size.
I don't see any reason why it would work better or worse when inserted from a tool palette?
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