You know, I just finally got around to doing this mod and I noticed a difference in our carbs. Where you had to pound the tubing in, mine has a fitting threaded in. I'd capped it off so long ago that I'd completely forgot it was there, but now all I need to do is run a hose back to the charcoal canister and I'll be set
I also noticed the paper gasket had walked out a little and doesn't look like it was sealing at all
I hate to break into my backup rebuild kit for just one gasket, but I don't really feel like making one of these from scratch either. It's just too dainty for me to do a good job.