I'm slowly venturing into the realm of DIY gear (have sewn off and on for years), and one of the projects I would eventually like to do is a very lightweight Summer TQ. Just thinking about materials right now, and I'm curious what you all think about using Momentum 50 vs. Momentum 90 (ignoring the price difference and current lack of color choices) for making a down Summer-in-Arizona TQ. I would ideally be using it in my Traveler in conjunction with a partial bugnet in temps above 50F, so my legs would need to be covered at all times so I don't unintentionally donate blood. Oh, and I'm an UL backpacker, so I do love to count the grams

Any experiences and advice?

Also, really appreciating all of the resources on HF and those who provide them. Thanks!