Oh thank you from the bottom of my heart for your insight Gamka, please allow me to continue living in your god like shadow...

Go Pentax build tolerances!
Go Gartmore!
We should have some gold K model tie pins made for acts of such bravery!

For cleaning on the fly the visible dust electostatic brushes seem to have some cadre but I sold minehere to a fellow forummer, as with a Pentax I have found that the Cameras own cleaning system was just as effective, He had some very very stubborn dust which the brush eventually removed.
Pollen is the thing it's a bugger to get off and only wet cleaning seems to solve that...

I have to admit that of all I have owned, and the list is extensive.
Over the the last five years: Canon 50D/7D/5DMKII, Sony:A77/850/A900, Nikon: D90/D200/300/300s/D700/D800/D800E/D3/D600x2/D7000, Pentax: K5x2,K5IIs/K3.
The single digit K bodies have by far and away the best dust removal system, I have never had to wet clean a Pentax, it's a bit unfair on the 35mm sensor size because the larger area is simply prone to more dust, just a fact of life I'm afraid but that does not excuse the D600 which finished me with Nikon for good...
As the 5DMKII did with Canon, I mean a Camera that packed up in the mist, what a pussy!

Yep Ralph, thats how I read it, anything where the lens comes off is a pentax.
So if you buy GR Drop it and the lens falls off it's now a Pentax

Ok 1.53 it is...

Me included!
Ok as long as there is an appropriate pigeon Hole to stick em in...

touché, Brilliant riposte!

I'm totally anal!

THEN NO ONES GIVEN ME A DEFINITIVE ANSWER EITHER WHICH IS DRIVING ME NUTS!

1.52?