@james this would lead to kernel 5.9.14 installed and kernel 5.10-rc7 being available:
Rock to Rolling conversion successfully
Read this also before attempting that:
Rolling major upgrade 2020-12-13
We have not tested this conversion since the Rolling major upgrade but it should work. So be sure you have any irreplaceable data backed up before doing.
Alternative: Our automated build system (ABF) is to sluggish right now due to massive upload to our mirrors. When that is working normally again I will post links for latest OM Lx 4.2 ISO’s in another thread. These are Rolling branch ISO’s that may become Lx 4.2 Beta.
I hope something I wrote was helpful.