scrapy-beautifulsoup | Simple Scrapy middleware to process non

Question: Is there a way to integrate BeautifulSoup's html5lib parser into a scrapy project--instead of the scrapy's default lxml parser?
Scrapy's parser fails (for some elements) of my scrape pages.
This only happens every 2 out of 20 pages.

As a fix, I've added BeautifulSoup's parser to the project (which works).
That said, I feel like I'm doubling the work with conditionals and multiple parsers...at a certain point, what's the reason for using Scrapy's parser?
The code does work....it feels like a hack.
I'm no expert--is there a more elegant way to do this?

Much appreciation in advance

Update:
Adding a middleware class to scrapy (from the python package scrapy-beautifulsoup) works like a charm. Apparently, lxml from Scrapy is not as robust as BeautifulSoup's lxml. I didn't have to resort to the html5lib parser--which is 30X+ slower.