Wanted an easier to mount v2.1 adapter for Thorped's fan. Attached with 2, M4x15 cap head screws
V2 isn't necessarily better, I just rotated it up about 1 additional degree. The original is good if you want the fan duct closer to the print. I also made a little better effort of lining up the hole for the fan mount. Personally using V2 now as the original made me nervous the duct might catch on imperfections.
Monoprice Maker Select v2.1
Suggest ABS, my first PLA print warped over time.