Just finished my first build in quite a few months. I wanted to do a quick weekend build of Alfonso's Arex I-X, but as I got into it, I realized the model lent itself to some super-detailing, so I added some. Among the improvements: Accurized systems tunnel and fuel lines, panel detail, joint detail added to the RSRM, hold-down posts added to the aft skirt, separation and roll motors added and other bits and pieces. As I've built it, the model lacks the Aft Skirt Thermal Curtain (ASTC), that insulation shield that looks like half a bagel that surrounds the RSRM nozzle. I'm trying to find out if the Ares I-X has it. I know the RSRMs used to launch the shuttle have the ASTCs, but I was watching the NASA Channel the other day and they showed video of the static firing of the five-segment RSRM planned for Ares I and the aft skirt lacked the ASTC. I don't know if it was unnecessary for the test and therefore left off, or if Ares I-X will fly without one.