I found the Softears Liquid Silicone Ear Tips to also be an excellent choice with indigo. There similar material as the Xelastecs but like the crystal then don’t loss shape or attract dust, another good one is the epro tws.The azla Crystals are orders of magnitude better than the Xelastecs. Ok, that borders on hyperbole but they are much better. They grip better, dont deform, dont degrade, dont attract dust and keep a really good seal.
Congratulations on getting the indigo, looking forward to hearing you‘re thoughts on them.