This design is based upon one created by @paulwb (https://makerworld.com/en/models/31020) although the design wasn't remixed, it was created from scratch for me by Hammy Tan (https://www.upwork.com/freelancers/~01ca44a72dc5f3c437).

The idea is to attach a hood over the exhaust vent from the X1C so that fumes can be exhausted via 4 inch air ducting. This attaches with magnets, allowing easy attachment and removal. There are holes for 2-4 steel pins to guide positioning as the pins fit into holes and screwholes on the back plate of the X1. Modifications made from @paulwb version include (a) cutout around the AMS hub (b) provision of two ribs on the end where the air vent fits, so it can be clamped in place (c) versions pointing up/down/left/right and straight back.

I printed this in Polymaker Tough Polycarbonate (actually a polycarbonate mix) with bed 105C nozzle 270-290, 25% infill, 4 walls. I used tree supports for the underside and inside of the air duct.

Products used to complete project:

1/8" foam padding for seal: https://www.amazon.com/gp/product/B0B5WWP25Q

10mm diam 3mm thickness neodymium magnets: https://www.amazon.com/gp/product/B0C697TTK4 (need to be pressed into place with pliers - may need drilling out with 10mm drill if no supports used in these recesses)

2mm diam 8mm length steel dowel pins: https://www.amazon.com/gp/product/B0BC8ZQ52Z (may need to be drilled out with 2mm drill)

Video of print with PC on X1C: https://imgur.com/a/i5GQFUv