A personal flying log book is precisely that. It is personal. Whether the hours count for anything afterwards is a different story?
If you have operated in any way as part of the "operating crew" you should log the time.
I reckon I lost 1000hrs TT following this nonsense trying to make it legal. Just log it.
How about this one.... I had a flying licence but not on the aircraft in any way. I hand flew it (a twin jet) 2 hours across europe pre RVSM including take off and landing. Do you suggest I do not log that in my personal flying log book? It has very limited value for anything but it was real, it happened, I learned a lot from it. It should be logged?