I've read the entire thread. There is no price that can be put on peace of mind...it is priceless :0) You are so happy with your present Viking...now you have committed to a another and with a dealer you have confidence in....I think I see you doing "The Happy Dance"
BTW keep that hubby around to be proactive for his sweetheart and take the slings and arrows of a shop owner who was 'playing' on your kindness it would seem in making you 'wait' until Tuesday for refund....I think in her case Tuesday would never come.
I have to smile with your Mother's adage....it all works out. Now that dealer can resell her machine on eBay and make all that money she told she was losing if she'd followed through with the sale with you. More importantly you are sticking with a brand of machine you are familiar with and dealing with a merchant that has a long track record.