If you are planning on switching from your standard drivetrain to 1×10 check our brand new Octane One Booster 42T cog.
This oversized 42t cog is designed to be used with 10spd cassettes for extending the gear range with 1X drivetrains. CNC machined from 5mm thick AL 7075 T6 plate for great strength. Compatible with both SRAM & Shimano cassettes.
More photos and details at: https://octane-one.com/booster/