Hey benderete, Thanks for sharing your latest work! Concerning the Tau Node we already have a PI node on which you can specify a multiplier. We also have an internal Relay node which we will share soon with some other related goodies. But again thank you so much for sharing it! About the [Ext] nodes, their 'available' bool property is purposely set to false on the NodeAttributes(...) which make them hidden from the palette. This is an early implementation of those operations with a dynamic number on input ports but it still does not correctly propagate types nor set internal values correctly. They should NOT be used for now.