https://ibb.co/r2xJ0Bg8

I am weaving my first block weave structure using my Jane loom (see draft included) using 8/2 cotton with a sett of 18 epi (which I now know is really too low...probably should have gone for 20 epi or more). Anyway, I am having a couple of issues. When throwing a pick , the already woven fabric forms a series of 'hills and hollows' making firm beating problematic. This issue can be partly solved if I raise all levers before beating on what is then a flatter warp. However this is quite time consuming, as normally I would change shafts between picks by lowering and raising levers at the same time. The other issue is a loss of tension on the lower shed, particularly on the right hand side of the warp. I will include a photo of this in a follow up post, because if I try to do it now, this whole post is likely to vanish. I wonder if it has something to do with uneven take up of warp threads in the 'framer' sections of the weave, compared to the squares?? Any insights or suggestions welcome, as I am now hesitant to try this weaving structure on a larger scale on my David in case it all turns into a bit of a mess! Thanks. ( Note- photo of loose warp threads to follow...hopefully!)

This post goes before the one with the 3 photos at the top...gets a bit confusing between posts and replies etc!