What countermarche do you have?
If you can’t find someone here, I’d track down Joanne Hall. I’ve asked her questions on Ravelry — can’t remember the forum/group. It was awhile back when I was researching looms to buy.
you might be able to ask at Glimakra in Eugene, Or.— she may still run it. I can’t recall.

Also, photos would be helpful?

Could you cut, sew, and wash what you’ve woven? You could see the result of the gap?

Hi, thanks for the reply. I have a 47" Glimakra standard. I have had very good luck with talking to the folks at Glimakra in Oregon. I just thought this forum might have good thoughts on this particular issue.

Oh I see this comment about Glimakra, so take that into consideration as you see my reply to your later post below.

Thanks. Yes, i'm through beaming, threading and sleying and time permitting i will tie on tonight and start weaving and then we shall see.

i agree with you mostly, but the specific issue i'm focused on right now is that i made a new set of lower lamms for my loom, and due to the geometry, the holes for the center cords that connect to the jacks do not align with the similar holes in the upper lamms (even though i used the uppers as a template). i can probably fix it by adding new, more closely aligned holes, but that involves a lot of untying and drilling and retying, so i was hoping someone would tell me it makes no difference so don't bother. but at this ppoint i'm going to weave my current warp and see how it goes, then maybe fiddle with the hole positions when i'm between warps.

What brand of loom do you have? My toika requires that my upper lamms be angled towards the shafts, while the lower lamms are parallel to the floor. That might change the geometry, if that is relevant to your loom. Have you been using "top of the lamm" setup? if so, you would want the holes to be above each other so there is less friction on the Texsolv cords going down to the treadle. I have mine setup this way, but at this time I only have 4 shafts hooked up. Getting the other 4 shafts hooked up will require more time and more Texsolv. I have the texsolv, but I've been busy with my time, lol. I want to get the 8 shafts up and running now that I've been weaving for a year. I believe I'm ready.

Another thing, Toika Looms have different dimensions than Glimakra looms. On a Glimakra the back beam is higher than the front if I study the diagrams correctly. That might be why they have the shafts front to back elevating at each shaft, so there is a straight angle/elevation with the warp. My Toika is the same height at the breast beam and the back beam so the threads go straight through the heddles parallel to the floor. There are not many instructions that are helpful for my Toika. Much more info on the Glimakra due to Joan Hall's book on the Glimakra. So I learned slowly about my toika mostly with the help of Ravelry.

Thanks Barbara,

you make a good point about Jane re-sleying wider. i saw that episode too, and it does seem like if you can do that, you can have a gap in the middle. Thanks for pointing that out.