I used a 5 litre container to test mine and a bungey cord to hold the stick to the socket. On my 2nd homebrew repaired VCU I got around 6 seconds but I think that might be because it is leaky and will need rewelded.
My previous attempt was better sealed and took around 11 - 13 seconds.
Can I ask Alibro. What viscosity fluid did you fill your VCU with? I've just received 400ml of 30,000 cts which is the grade used in the VW Synchro.
From research I've done on the Freelander VCU, most places recommend 100,000 cts. This is a bit thick I feel for a vehicle that spends most of its life on the road. Off road, it might take a bit more spinning at the front to wake up the rear but not much more than normal. Thinner is definitely kinder to the IRD and diff.