The monitor mounts are made of MDF with countersunk holes to hide the bolt heads which connect it to the channel. He figures the total cost of the mount was around $40. Seeing how easy it was ...

Amazon Basics Gas Spring Dual Computer Monitor Arm Mount — $42 (was $52) HUANUO Dual Monitor Stand — $50 (was $60) HUANUO 17-32 Inch Dual Monitor Stand, Gas Spring Dual Monitor Mount — $59 ...