I wonder if it's possible to build a fully functional cockpit without using Helios at all...
So far we can export some "render to texture" displays to external monitors. ie: UHF repeater, MFDs, Clock, CMSP, etc and for panels we can use DCS Bios and Arduinos daisy chained through I2C or RS485 buses
BUT for some gauges Helios is very convenient and does a great job
In my case I'm using Helios, DCS BIOS and .LUA export at the same time and I'm having a big performance impact in my flights. Has anybody built his pit without relying in Helios at all?