very sloppy punctuation in the creation of that run-on sentence.
lose the comma after the word "error", replace the comma with a period.
then, if you're going to create a parenthetical phrase after "other",
you must put another comma after "ercoupe. there; that's much better.

If you're going to criticize someone's punctuation, you had better
learn to punctuate correctly. If you live in the U.S., put commas and
periods INSIDE the quotation marks, like this:

You'll find that rule in any grammar text published in the U.S.

lose the word "error," .... parenthetical phrase after "other,"
.......you must put another comma after "ercoupe."

And BTW, "Lose" and "Ercoupe" should be capitalized; and "castor" is a
kind of oil used in rotary engines. The word you want is "caster."

vince norris