It's only differences training now, the requirement for GFT that used to be there went away a year or so ago.
With your experience I'd expect 1-2 hours for a 3-axis microlight conversion (probably a little more if it's something more slow and draggy like a TST), and 8-12 hours for a flexwing conversion.
Personally I just amended a couple of columns (multi-engine ones in my case) that I wasn't using in my existing logbook. I think that some people keep separate logbooks, but that seems a bit fiddly to me.
And you need to maintain both currency requirements - 12 hours in the second of 2 years for SEP, 5 hours in 13 months for microlight.
G