mkc

I would flip-flop the process.

Load the 3 layers and longarm the background first, then unload and finish the outlines on the domestic.

The quilting on the longarm will stabilize the layers (add pin/thread basting if needed afterwards). Spray basting first might cause issues if it needs to be rolled up on the front bar of the longarm - the layers will try to shift when rolled up and can't if they are spray-basted.

(ETA - basting on a longarm is a service some offer for those who want to quilt on the domestic but don't want to deal with basting. This would be doing something similar in effect)

Michelle