Question Instrument Training in a Tandem Aircraft

[olympiashorts]

I have an experimental Cub with a glass panel and no instruments in the back seat. I am hoping to get instrument rated but doubted that there are instructors out there who would be willing to train in my plane. I thought about offering to give them opera glasses so they can see the panel from the back seat but I'm guessing this wouldn't "fly" either . Does anyone out there have experience with this? Living in western Washington we often have a marine layer with blue skies less than 1000' feet up and plenty of VFR elsewhere so this is my main motivation.