<p>Most saxophones, [(except for)A] the straight-bodied sopranino and soprano [(models)B], [(with)C] an upturned lower end and a detachable crook, (or neck)D, at the upper end. [(No error)E]</p>
<p>C is definitely wrong, but because “saxophones” and “models” are both plural, shouldn’t it be:</p>
<p>Most saxophones, except for the straight bodied sopranino and soprano models, have upturned lower ENDS and detachable CROOKS… ?</p>
<p>thanks.</p>
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Their plurality is irrelevant; with is a preposition and therefore never singular or plural. In addition, in other sentences with a subordination conjunction like except, the new noun(s) named in the subordinate clause do not affect with the main subject’s role in determining the number of the verb to follow (in addition to, along with, etc.).</p>
<p>Even though the subject is plural, most means that, taken individually, more saxophones come equipped with either an upturned crook or a neck than those that ship with neither, and not that each model ships with either a crook or a neck and a constant duplicate. </p>
<p>Most cats have a long tail.</p>
<p>Most cats have long tails? Maybe deified ones.</p>
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<p>XD thank you!</p>