Sounds like something moved during tightening or he set the caster negative vs positive on the right side. Guy made that mistake on my Bee and it would go around a right hand bend on it's own at 60mph.
That or you have some severe pad drag on the right wheel..
Haha. Yeah. If the brake lines, checking for radial pull, or idler arm don't fix the issue, I'll take it back to my alignment guy. If that doesn't work, starting from square one and pulling the suspension apart and starting over.