Day 1: Hotham > Feathertop via Razorback
Day 2: Feathertop > Diamantina Spur > Dibbins Hut
Day 3: Dibbins Hut > Hotham
I'll have a 4 hour drive from Melbourne to begin day 1 and end day 3, so not worried about those days being short (3-4 hours of walking from my research), but I was looking at ways to extend day 2.
I am fairly fit and have done overnight multi-day hikes before, so would like to be walking for 7-8 hours given the long daylight hours in January - although this would be subject to the heat at the time.
So I was thinking I could at least visit Weston's Hut (from Blairs) but then discovered I could go all the way up to Pole 333, visit Mt Jim, Youngs Hut, down past Basalt Temple and onto Dibbins. This would make for an approximate 24km day (and perhaps 9 hours walking with breaks), but I would have the option of staying at Youngs Hut to shorten it, and it wouldn't add much more the last day (remembering the long drive home). Again, this would be subject to the weather and wouldn't be done if it was too hot.
Also have options to not do the "side trips" to Mt Jim or Youngs Hut if I needed to shorten the extra loop once I'd started it.
I also like the idea of not staying at Dibbins Hut in the middle of school holidays assuming that it will be pretty busy.
I'd really appreciate some feedback on my ideas for extension - as I've already read all the threads on the standard loop and feel very comfortable with that - including going down Diamantina Spur

Thanks!