Does the pressure plate really help to get stable pics?

[sophocle]

I don't know if it is worth the price, but it does work as claimed.

It is espesically noticable towards the end of the cartridge, as it practically eliminates focus breathing and weaving.

Mid roll on a long shot there is no difference, but before I used it I would simply have to let the first and last 5 ft go to waste--I never dared put a good take on it.

I use Beaulieu cameras frequently serviced, but I noted the same results with a high end cannon as well.