Hi Sis and welcome home. Glad to hear my Niece did so well, but then I expected she would, she always does.
Proud Auntie here!
I know somewhere on this forum or either RV.net there was a link for doing this exact thing you're looking for and I think with the directions being as good as they were and with pictures that the Brother in Law would be able to do it. I will also look for the link and either post it here or send it to you via e-mail.
I also think Rob Cooley did something similar to converting his cord to 30 amp from 50 amp.
We are leaving tomorrow for Bay City but I will be on my cell if you get a chance to chat.
Hugs and Love ya,
Patty/Samantha