Geomax Zoom90

Nope

Also no, though in reference to a GeoMax Zoom80R.?ÿ Have you eliminated the obvious problems, like shaky setups, loose tripods or sloppy sights??ÿ That instrument should be accurate enough that traverse closures aren't a problem.

?ÿ

Yes. Two 3 setup traverses all wide open, solid ground, tripod tight, rod plumb and used with bipod. Closing in between .12 to .15 over 1600 feet

Are you using OP tribrachs or the laser plummet??ÿ ?ÿAn OP out of adjustment can add up quickly.

Data collector or manual notes??ÿ Prism offsets verified for each shot??ÿ Do the angles close??ÿ Lots of things to check...

i find with the installed laser plumet, my closures were not that good, however switch to the optical plummet installed in the tribachs, my closures improved significantly. Note, I used tripods, tribachs for my prisms for my back and foresights.

The standard tribrach is weak but still decent and capable. I use Leica tribrachs.

0.12ft was my closure after running about 3 miles using Sokkia Set 330R, 3 matched aluminum tripods with Sokkia & Lietz tribrach and prism targets for BS & FS and turning single angles.

"Do the tighten up"

i find with the installed laser plumet, my closures were not that good, however switch to the optical plummet installed in the tribachs, my closures improved significantly.

I'm not crazy about the laser plummet, it has some real usefulness when plumbing over marks deep in a well, but otherwise I prefer an optical tribrach.?ÿ The only reason I don't swap out the tribrach is that I'd lose the ability to easily check the plummet adjustment by rotating the alidade.?ÿ Instead I spend a lot of time crouching down with a while plastic card to see where the center of the laser dot really is.?ÿ (Down, check, up, adjust, repeat as needed, usually about 3 times per setup.)?ÿ Keeping the laser intensity at 20% also helps, shading it when checking.

Never used a laser plummet.

After using laser sites to peg scopes on rifles and distos in the bright sunshine, I envision carrying a tube along as a shade, something like a length of perforated pvc sewer pipe to hang down from the tripod in order to see the light on the setup mark.

Sorry, I didn't mean to get the discussion sidetracked to laser plummets.?ÿ ?ÿI like them because I find them a little faster to set up, and less chance of getting out of alignment, but I dislike them because of sunshine and because you need to wait for leica to go through its initialization before it will turn on.?ÿ The shadow of the instrument case does help with the sunshine.?ÿ NOW, back to poor closures...

If it never closes, you have some other issues at work.