How about target practice?

Using the optical VF take a picture of something, then from waist level, point and shoot the camera at the same object and see how close the two shots are - closest wins!

Using the 80 to 200 lens on 200 would add difficulty!

I had a broken flash cover glass and focus problem: all photos were out of focus. Both resolved.

I have used Harrow Technical in the past to service my LX - they did a great job and completely replaced the foam and the seals, fantastic service.

As for which camera to service first, if it is just funds, I would go for the one in better condition, if it is not to do with funds, I would consider getting both done at the same time. I sent Harrow 3 cameas for servicing: LX, MV and Zoom 70 at the same time.

I do not shoot weddings, but I do shoot in my local school hall and at f2.8 I am up at ISO 800 on my K7, I shoot on manual taking a reading as the lighting is constant and usually end up at 80th to 100th on the shutter - I would be lost without the 50-135 SDM lens! Nothing else comes close, I have a Tamron 70-300 though not as good as the Pentax 55-300 the long end f5.6 is just stretching the ISO too far.

If I was using the K5 I would be happy to go to ISO 1000, however on the K10 I would not go above ISO 600 for this due to high levels of noise, especially in low light areas.

As Fletcher states, go scout the church, take test shots on the K5 and K10, take a gray card, set and note your white balance setting (this will save a lot of playing about with your RAW files later).

Remember that SRS Microsystems has a Pentax Hiring service which would allow you to use a 50-135 for £50 for 3 days!

May I ask why no flash? Yes not for the wedding service but later, if the day is bright you may well have a problem with shadow and contrast, defused flash might make a big difference to any out side shots.

Again, to reiterate:
1) use RAW+ and pay very close attention to white balance (use a gray card if you can), it will make all the difference during your work flow later.
2) Lable all your cards with numbers, pre-format in camera before the day.
3) Also remember the old Irish proverb written by Murphy: "Two spare batteries will not be enough"! (you can always take the charger if you have just one extra battery.
4) Oh, and scout the indoor venus before the day, or get there really early on the day, if you are not also covering the bride before hand.
5) Also, it is good to discuss with teh bride, teh type of shots she wants before hand - get some wedding magazenes for ideas, take cuttings.

Lastly, good luck and have fun.

That's more then the Pentax one!

If/when I get a Q, I am planning on making one out of cardboard, should work with the zoom as well depending on how far I hold the camera from my eye!

Whip out your velvet! In public! I'm surprised at you George!

Alternatively the little £200 optional optical viewfinder that is suited to just the standard lens is such a great idea!

Just John then?

Can't use it on my LX though due to the lack of an apature ring and, sadly my 5MZn is not weather sealed.

Auto 110 lenses rely on the built in diaphram with 2 blades! Though you have no control over apature, the Auto 110 is pure point and shoot.

The Lenses are fixed at f2.8.

As I understood it, the toy lenses are without any form of diaphram but the non-toy lenses have a built in shutter and diaphram.

The good Q to K adaptors also have a built in shutter and diaphram, so all you loose is auto focus, AV mode is supported.