Nelson adjustment for best accuracy?

Hello folks, Can someone advise me on the best way to set up the Nelson unit for best accuracy? I used the supplied key to tighten the guide rod, and don't know if the pistol is meant to be used with the guide rod just snug, or if I should have it as tight as I can get it without breaking it.
Thank you.
Amanda

I was told just turn it till you hit resistance or it becomes snug then give it just an eighth of a turn maybe to snug it up. I was warned that it wouldn't shoot very well if too tight. I just turn it snug. Not very tight. Tight enough where it won't shoot loose.

The rod draws the barrel down against the top of the frame. You cannot over tighten it. But not necessary to get it that tight. When tightening the rod, the rod end pushes against the slide stop pin. Make sure slidestop pin has a little play between side of frame so it can freely rotate. The rod end will mark/scratch/ding/depress the slidestop pin. This is normal. If you don't tighten it enough it will come loose and pistol will still function; will not be accurate though  So make sure its tight.
Jon

Early on I didn't tighten it much but had it loosen while shooting. Now I snug it up pretty good.

Tighten it down a good bit, but not straining tight.  i assume around 15-20inlb.

(If you have a threaded muzzle i highly recommend removing the thread protector or loctite it in place, this is null if you have the weight attached.)

Thanks folks! I tried it loose, and the groups floated. I had been wrenching it very tight, with a few FTF. I next tightened it about 1/2 turn after the rod made contact, and it is nice and snug and now reliable as well.