Transmit from I/Q files

Currently enjoying my new LimeSDR Mini, happy with sdrAngel (on Ubuntu) and SDR Console v3 (win10)…
However, I am in want of an easy way to transmit from prerecorded iq files. I have messed around with pothos flow but have had no luck. All I want is to be able to transmit from an iq file source.

GNU Radio Companion?

I don’t think that GRC has better support for LimeSDR than pothos. Is there a simple pothos flow diagram and/or tutorial out there I’ve somehow missed showing how to do this?