Here it is on the mount, using temporary solution (while waiting for new saddle).
In total, ~30kg of weight.
Hopefully weather in Melbourne will hold for the first light
And it did...
The hardest part was to remove the OTA from mount - I had to use the support crutch which held the counterweight in horizontal position while I was sliding the OTA out from the improvised saddle.. it is really heavy, and one clumsy move (and unfortunately they are happening more often recently) and the damage can be fatal (for scope or for me).
I will definitely need that Skywatcher thing (expecting it next week, then I have to organise machining next Saturday)