You need to purchase another adjustable tie rod a you can't shorten the solid one, then you can cut down the right hand threaded ends after first tapping the deeper.
Yes plates are welded both sides, I also regret not putting a strengthener plate in behind to so would recommend doing that also.
Here's how I built mine from a scrap beam, its not a bad job but cleaning off the old ends etc is pretty ******.
It's scattered down this page,
http://forum.earlybay.com/viewtopic.php?f=2&t=38541&start=20" onclick="window.open(this.href);return false;