These belts butt up with the tape overlapping that line.
We use some large, stationary Somaca belt sanders as well and it would be interesting to see if some of this belt material could be cut for use on smaller machines. The notion that it might be possible to fabricate belts from new roll stock also poses possibilities; hopefully, some of them might deal with saving money.
As to your second paragraph, my head is a little hard. Does "grinding off the grid" mean you are grinding each end of the cut roll for a half lap joint? What kind of glue was successful for you?
Regards,
Edward Hennessey