Thanks for this detail so far. New to this thread but facing similar problem as @NW1000 . 

I have a few big R dependencies (messy combo of Matrix, lme4, rstanarm). It used to take 10 minutes to install from jammy after starting a cluster but now taking 30 (haven't sorted out why though).

I followed your recs, copied the packages to Volumes, and then made the new init file for Renivorn.site. But the cluster fails, like it does with NW1000. Gemini is suggesting it's because the cluster doesn't have access Volumes at this point in the boot, but I'm still struggling to get it all fixed. I'm also struggling to find the log for the init in the Driver Logs.

Are there any other potential fixes I can explore?