I'm thinking about trading my big N. maxima 'Broad Peristome' x 'Celebes Striped' because it has outgrown the limits of my house's winter lighting. It has four growths and is ~27" tall, with all four growths being in that range. Leaves run ~10", not counting tendrils. It originated as a cutting from a plant grown from ICPS seed and its most notable feature is that its peristomes are almost black if grown in strong enough light. I can't give it that much light, but it's a very healthy, strong plant.
I'm not looking for more CPs, since I don't want to grow Neps unless I solve the winter light issue and I've filled all the plausible space that Sarrs can grow. So I'm open to suggestions and one thing I'm interested in is hardy cacti that can tolerate the northeastern climate. I already have Opuntia humifusa and I'd also be interested in Echinocerus, Escobaria, Gymnocalycium, smaller Opuntias or others that might be happy here. I much prefer plants that don't need to be inside during winter, but I'll consider anything and it doesn't have to be a plant.
Here are a couple photos: