Modpack: Crimson Skies V1.2.4.2
Mod: tinker_io-1.12.2-release 2.6.1
Java

I have a smeltery melting sand into Clear Glass. The Molten Glass in the Smeltery is moved into the side of Smart Output block using a basic Servo and hardened fluiduct. The Smart Output block has a Basin Upgrade. This all works fine, the Molten Glass is cast by the Smart Output block into Clear Glass.

However, I cannot get another Servo and Itemduct to extract the Clear Glass to a chest/crate/etc. I've tried attaching the Servo to multiple sides of the Smart Output block with no results. The Servo is set to ignore Redstone signals, but I still cannot get the output from any side of the block.

What am I missing?

The issue is caused by the old API used in Tinker I/O 2.6.1. The issue was solve in Tinker I/O 1.12.2 rw2.8.2. Thanks for your report.